Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 9786 (1981): Code of safety for vinyl chloride (VCM)[CHD 8: Occupational Safety, Health and Chemical Hazards]

IS : 9786 - 1981

Indian Standard CODE OF SAFETY FOR

VINYL CHLORIDE ( VCM )

UDC 614.878 : 547.361.113.1

© Copyright 1981

INDIAN STANDARDS INSTITUTION MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

Gr. 3 J u ly 1 9 8 1

AMENDMENT NO. 2 AUGUST 2007 TO

IS 9786 : 1981 CODE OF SAFETY FOR VINYL CHLORIDE (VCM)

[Page 4, clause 3.1(g)] — Substitute the following for the existing:

'Freezing Point, °C: -159.7'

[Page 4, clause 3.1(h)] — Substitute the following for the existing:

' Flash Point, °C : -78 (Open cup)'

(Page 5, clause 4.1.1) — Substitute the following for the existing:

Threshold Limit Value (TLV) for vinyl chloride is 1 ppm (2.56 mg/m3) Al-Carcinogen

NOTES

1 (TLV-TWA) — The TWA concentration for a conventional 8 h work day and 40 h work week, to which it is believed that nearly all workers may be repeatedly exposed, day after day for lifetime without adverse effect

2 A1 — Confirmed human carcinogen. The agent is carcinogenic to humans based on the weight evidence from epidemiological studies.'

(Page 5, clause 4.1.2) — Delete the sentence 'Inhalation of more than percent by volume may be dangerous to life.'

(Page 6, clause 4.2) — Add the following new clauses after 4.2.1:

'4.3 Chemical Hazards

This substance can under specific circumstances form peroxides, initiating explosdive polymerization. The substance will polymerize readily due to heating and under the influence of air, light and on contact with a catalyst, strong oxiding agents and metals such as copper and aluminium, with fire or explosion hazards. The substance decomposes on burning producing toxic and corrosive fumes (hydrogen chloride, phosgene). It attacks iron and steel in the presence of moisture.

1

Amend No. 2 to IS 9786 : 1981

4.4 Inhalation Risk

A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

4.5 Effects of Short Term Exposure

The substance is irritating to the eyes. The liquid may cause frostbite. The substance may cause effects on the central nervous system. Exposure could cause lowering of consciousness.

4.6 Effects of Long Term Exposure

The substance may have effects on the liver, spleen, blood and peripheral blood vessels and tissue and bones of the fingers. This substance is classified as Al, confirmed human carcinogen.

(CHD 8)

Reprography Unit, BIS, New Delhi, India

AMENDMENT NO. 1 MARCH 2002 TO

IS 9786 : 1981 CODE OF SAFETY FOR VINYL CHLORIDE (VCM)

[ Page 4, clause 3.1(b) ] — Insert the following after 3.1(b) and renumber the subsequent entries:

'c) U.N.Number : 1086 d) CAS Number : 75-01-4'

( Page 6, clause 5.2 ) — Insert the following at the end 'In an area where vinyl chloride monomer is handled, all the electrical equipments and fittings must be flame proof type as per IS 2148 and IS 8240.'

(CHD 7) Reprography Unit, BIS, New Delhi, India

IS 19786 - 1981

Indian Standard CODE OF SAFETY FOR

VINYL CHLORIDE ( VCM )

Chemical Hazards Sectional Committee, CDC 18

Chairman

SHRI S . C . KALE

Members DR V. P. GUPTA ( Alternate to

Shri S. C. Kale ) SHRI K. D . AMRE

Representing

Directorate General, Factory Advice Services & Labour Institutes ( Ministry of Labour) , Bombay

National Organic Chemical Industries Ltd, Bombay SHRI M. C. PATWARDHAN ( Alternate )

SHRI C. N. CHANDRASEKHARAN

SHRI CHARANJIT LAL SHRI B . R . DAVE ( Alternate )

??? CHOUDHURI

Directorate General Ordnance Factories ( Ministry of Defence), Calcutta

Controller of Explosives, Nagpur

Indian Chemical Manufacturers' Association, Calcutta

SHRI D. K. SIRKAR ( Alternate ) SHRI A. M. DAND

SHRI D . L . VYAS ( Alternate ) DEPUTY DIRECTOR ( CREM ),

RESEARCH, DESIGNS AND STANDARDS ORGANIZATION, LUCKNOW

DR S . S . GOTHOSKAR

Indian Petrochemicals Corporation Ltd, Vadodara

Railway Board ( Ministry of Railways )

Directorate General of Health Services, New Delhi SHRI R. BALASUBRAMANYAN ( Alternate )

SHRI K. C. GUPTA National Safety Council, Bombay SHRI N. RAGHAVAN ( Alternate )

SHRI C. HINGARH SHRI J . J . ADHIA ( Alternate )

DR V. R. B. MATHUR

SHRI O. P. NANGIA

Century Rayon, Kalyan

Directorate General of Technical Development, New Delhi

Hindustan Organic Chemicals Ltd, Rasayani SHRI A. G. SHESHAN ( Alternate )

DR K. NARAYANAN RAO D R D . J . PARIKH

Bhabha Atomic Research Centre, Bombay National Institute of Occupational Health,

Ahmadabad

( Continued on page 2 )

© Copyright 1981 INDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyright Act ( XIV of 1957 ) and reproduction in whole or in part by any means except with written permission of the publisher shall be deemed to be an infringement of copyright under the said Act.

IS : 9786 - 1981

( Continued from page 1) Members

D R S . B . R A Y SHRI T . N . REWAL

SHRI P. DUTTA ( Alttrnate ) SHRI N . K . SAMANTA

S H R I A. SINHA ( Alternate ) DR P. N. VISWANATHAN

DR B. N. GUPTA ( Alternate ) DR HART BHAGWAN,

Director ( Chem ) ( Secretary )

Representing Ministry of Defence ( D G I ) , Kirkee, Pune Ministry of Defence ( D G I ) , Kanpur

Indian Explosives Ltd, Calcutta

Industrial Toxicology Research Centre ( C S I R ) , Lucknow

Director General, ISI ( Ex-officie Member )

Industrial Chemical Hazards Subcommittee, GDC 18 : 4

Convener SHRI S . C . K A L E

Members DR V. P. GUPTA ( Alternate to

Shri S. C. Kale ) SHRI G. R. BALABUBRAMANIAM SHRI CHARANJIT LAL

SHRI B . R . DAVE ( Alternate ) D R S . R . CHAUDHUBY

D R D . CHOUDHURI D E P U T Y DIRECTOR ( CHEM ) ,

RESEARCH, DESIGNS AND STANDARDS ORGANIZATION, LUCKNOW

SHRI V. N. GODBOLE

Directorate General, Factory Advice Services & Labour Institutes ( Ministry of Labour ), Bombay

Bhabha Atomic Research Centre, Bombay Controller of Explosives, Nagpur

All India Institute of Hygiene & Public Health, Calcutta

Union Carbide of India Ltd, Calcutta Railway Board ( Ministry of Railways )

Albright Morarji and Pandit Ltd, Ambarnath SHRI K . R . PRABHU ( Alternate )

SHRI K . C . GUPTA National Safety Council, Bombay SHRI N . RAGHAVAN ( Alternate )

S H R I P . V . KANGO Indian Chemical Manufacturers' Association, Calcutta

DR R. V. SUBRAMANIAM ( Alternate ) D R C . R . KRISHNAMURTI Industrial Toxicology Research Centre (CSIR ),

Lucknow DR P. N. VISWANATHAN ( Alternate )

D R S . L . M E H T A Century Rayon, Kalyan SHRI R . K . SHUKLA ( Alternate )

D R O . P . MITTAL DR C . S . B . N A I R

D R D . J . PARIKH

SHRI J . D. PARIKH SHRI M . V. DESAI ( Alternate )

Ciba-Giegy of India Ltd, Bombay The Fertilizer and Chemicals Travancore Ltd,

Udyogmandal National Institute of Occupational Health,

Ahmadabad The Atul Products Ltd, Atul

( Continued on page 10 )

2

IS : 9786 - 1981

Indian Standard CODE OF SAFETY FOR

VINYL CHLORIDE ( VCM )

0 . F O R E W O R D 0.1 This Indian Standard was adopted by the Indian Standards Institution on 20 February 1981, after the draft finalized by the Chemical Hazards Sectional Committee had been approved by the Chemical Division Council. 0.2 Vinyl chloride, also known as vinyl chloride monomer ( VCM ) is highly volatile and flammable gas which is ordinarily handled in liquifi­ed form under pressure. It is a synthetic chemical, and commercially manufactured either by cracking dichloroethane ( DCE ) in pyrolysis furnace or by hydrochlorination of acetylene. Vinyl chloride is used mainly for producing polyvinyl chloride ( PVC ) and its copolymers.

0.3 In 1974 it was first announced that prolonged exposure to high concentration of VCM could be the cause of a typical liver cancer known as angiosarcoma. However, in the absence of conclusive evidence different Threshold Limit Values ( TLV ) have been adopted by various countries. It is recommended that in India also all possible steps should be taken to achieve the recommended limits as early as possible ( see 4.1.1 ). It is recognized that this may be achieved only after some time but concrete time bound actions should be initiated to achieve these limits in due course.

0.4 In the preparation of this standard considerable assistance has been drawn from the following publications:

a) IARC Monographs on the evaluation of carcinogenic risk of chemicals to man. Vol 7. International Agency for Research on Cancer, Lyon. 1974.

b) NIOSH Recommended standard for occupational exposure to vinyl chloride. National Institute for Occupational Safety and Health, Ohio. 1976.

c) CIS Bibliography on vinyl chloride. International Occupational Safety and Health Information Centre ( C I S ) , International Labour Organization, Geneva. 1976.

3

IS : 9786 - 1981

1. SCOPE 1.1 This standard describes the properties of vinyl chloride; the nature of hazards associated with it; essential information and directions on storage, handling, labelling, cleaning of containers; selection and training of personnel, personal protective equipment and first aid measures.

1.1.1 This code, however, does not deal with the specifications for design of buildings, chemical engineering plants, storage vessels and equipment for operations control and waste disposal.

2. TERMINOLOGY 2.1 For the purpose of this standard, definitions given in IS : 4155-1966* and IS : 4167-1981† shall apply.

3. PROPERTIES OF VINYL CHLORIDE

3.1 The important properties of vinyl chloride are as follows'

a) Chemical names : Chlorethcne; chloroethylene; ethy­lene monochloride; monochloro-ethene; monochloroethylcne VC; VCM; and vinyl chloride monomer.

b) Chemical formula : H2C = CHCl or C2H3Cl c) Description : A colourless, flammable gas under

normal conditions of temperature and pressure but usually handled as liquid under pressure

d) Odour : Detectable by slightly sweet odour e) Molecular weight : 62.5 f) Boiling point,°C : – 13.9 g) Freezing point, °C : – 153.7 h) Flash point, °C : – 78 j) Refractive index nD10 : 1.404 6 k) Relative density, 10°C/4°C : 0912 1

m) Vapour density : 2.15 ( air = 1 ) n) Vapour pressure at 25°C : 34 atmospheres

*Glossary of terms relating to chemical and radiation hazards and hazardous chemicals.

†Glossary of terms relating to air pollution ( first revision ).

4

IS : 9786 - 1981

p) Solubility : Slightly soluble in water ( 0.11 per­cent m/m at 25°C); soluble in ethanol; very soluble in ether carbon terrochloride and benzene

q) Auto ( self ) ignition : 472 temperature, °C

r) Chemical reactivity : Polymerizes in light or in the presence of a catalyst; on com­bustion degrades mainly to hydrogen chloride, carbon mono­xide and traces of phosgene

s) Explosive limits, percent : Lower Limit — 3.6 ( by volume in air ) Upper Limit — 33 ( by volume in

air )

4. NATURE OF HAZARDS 4.1 Toxicity and Health HaaEards

4.1.1 Threshold Limit Value ( TLV)* — Recommended TLV for vinyl chloride is 1 mg/l ( ppm ) for time weighted average ( TWA ) exposure and a ceiling of 5 mg/l ( averaged over any period not exceeding 15 minutes ) for 8-hour work day and 40-hour work week (see 0.3 ).

NOTE — The threshold odour concentration of 2 000 mg/l ( ppm ) is many times higher than the TLV.

4.1.2 Liquid vinyl chloride in contact with the skin may cause severe skin burns and irritation. Inhalation in high concentration ( 2.5 per­cent ) causes dizziness, disorientation and burning sensation which disappears rapidly on discontinuation of exposure leaving slight head­ache. Inhalation of more than percent by volume may be dangerous to life. Concentration above 1 000 ppm in the working atmosphere slowly produces mild disturbances, such as, drowsiness, blurred vision, and numbness of feet and hands.

4.1.3 Vinyl chloride has been identified as a narcotizing agent and as a liver toxin. Exposure to vinyl chloride has been reported to result in skin damage, acro-osteolysis and disorders resembling Raymand's phenomenon.

4.1.3.1 A new syndrome known as ' Vinyl Chloride Disease' has also been manifest in recent years with clinical symptoms being in direct relation with the quantity of monomer absorbed and duration of exposure to It. This disease is characterized by alteration of the

*As accepted by the American Conference of Government Industrial Hygienists, USA.

5

IS : 9786 - 1981

skeleton, teguments, nervous system, the digestive apparatus, hepatic function, circulatory disturbances of the extremities and endocrine alterations.

4.1.3.2 There are also reports that prolonged exposure to high level of concentration in the working environment may cause angiosarcoma of the liver and similar diseases of lung, brain and lymphatic system.

4.1.4 All practical steps should be taken to control the vinyl chloride vapours in the working environment and keep them at a very low level.

4.2 Fire Hazard — The material is highly flammable [ see 3.1(s) ]. 4.2.1 Fire exposed containers may rupture by polymerization. In

case of fire, water sprays should be used to cool the vessel or tank on fire and the surroundings. If leakage persists the flame should not be knocked out. If possible, the source of gas should be cut off.

5. STORAGE AND HANDLING 5.1 Storage — Vinyl chloride is stored as a liquid under pressure, in cylinders, closed vessels or spheres in well ventilated areas. Gas cylinders and other containers used for storage of vinyl chloride should comply with the statutory regulation. Vinyl chloride may contain acetylene as an impurity and it is, therefore, necessary to exclude metals, such as, copper, silver, magnesium and mercury from vessels in which the material is stored. Steel is considered safer material for storage vessels. Storage vessels should be kept in safe areas.

5.2 Handling — Vinyl chloride tends to acquire an electrostatic charge during movement and, therefore, as a safeguard all pipe work and equipment in transfer system need to be grounded and earthed. Safety valves should be provided only on bulk containers and tank cars to avoid build up of excessive pressure. If there are any unavoidable leaks, reliance should be placed upon the elimination of all sources of ignition and on the provision of sufficient ventilation to keep escaping vapours at non-flammable levels.

5.2.1 Tank cars handling vinyl chloride should always be electrically grounded to dissipate static or induced lightning charges.

5.2.2 No heat should be applied to the tank car, an inert gas line or compressed vinyl chloride gas line should be attached to vent connection of the tank cars to provide a pressure during transfer of the liquid vinyl chloride from tank car to the receiving tank.

NOTE — This procedure generally applies to tankers which are filled for the first time. However, for tankers in regular service positive VC pressure is normally maintained which does not require the use of inert gas.

6

IS : 9786 - 1981

5.2.3 Some tank cars in vinyl chloride service are equipped with excess flow check valves. Opening of the discharge valves too rapidly is liable to cause the check valves to close. If this should occur, the outlet valve should be closed until the pressure in the tank is again built up and the excess flow valves open. Positive pressure of vinyl chloride should always be maintained in the tank to prevent the entry of air into it.

6. MARKING AND LABELLING 6.1 All containers of vinyl chloride shall bear an identifying label as depicted in IS : 1260 ( Part I )-1973*. Containers of vinyl chloride shall labelled as follows:

VINYL CHLORIDE DANGER

EXTREMELY FLAMMABLE AND TOXIC LIQUID AND GAS UNDER PRESSURE

KEEP THE CONTAINER CLOSED IN A COOL PLACE. KEEP AWAY FROM HEAT, SPARKS, FLAME AND OXIDIZ-ING AGENTS. INJURIOUS TO HEALTH — AVOID CONTACT. AVOID CONTACT WITH SKIN AND PROLONGED BREATH­ING OF THE VAPOUR. USE WITH ADEQUATE VENTILATION, GROUND THE CONTAINER WHEN EMPTYING.

7. MAINTENANCE AND DECONTAMINATION 7.1 Emphasis shall be placed upon immediate clean up of spills, periodic inspection, prompt repair of equipment and leaks, and decontamination of materials to prevent airborne contamination and skin contact with vinyl chloride. 7.2 Appropriate procedures shall be developed and implemented for the decontamination and/or disposal of all waste material. 7.3 In clean-up of leaks or spills, maintenance and repair operations of contaminated systems or equipment or any other operation in which direct contact with vinyl chloride is possible, each worker involved in such operations shall be provided with safety appliances.

*Pictortal markings for handling and labelling of goods: Part I Dangerous goods ( first revision ).

7

IS : 9786 - 1981

8. PREVENTIVE MEASURES 8.1 Entry of persons into the vessels for purposes of cleaning should be avoided by adopting mechanical cleaning devices. Pumps handling VCM should be fitted with suitable type of mechanical seals and the vessels should be prepared by proper exhaust/vacuum pulling procedure. 8.2 Area where vinyl chloride is handled should be well ventilated. All building materials should be fire resistant. A high standard of maintenance in the whole plant should be provided to facilitate com­pliance with the hygienic conditions. 8.3 All equipment from which the release of vinyl chloride may be foreseen should be given a visual check frequently to ensure that there are no defects likely to result in the release of vinyl chloride.

8.4 Potential areas of vinyl chloride leakage should be checked on regular basis. Solid waste material containing significant level of residual vinyl chloride should be transferred from the plant to special containers located in designated areas within the works boundary. 8.5 Whenever vinyl chloride is to be released into the atmosphere, it should be routed through high vent with sufficient dilution. All equip­ment handling vinyl chloride should have facility to depressurise and purge with nitrogen to high vent. There should be good ventilation/ exhaust system to remove vinyl chloride vapours from the atmosphere. 8.6 Personal Protective Equipment — The principal route of entry of vinyl chloride vapour in the body is through the respiratory tract by inhalation. Therefore, a worker working in high vinyl chloride con­centration should use suitable respiratory protective equipment. In confined places like reactors and polymerization plants, wearing of protective clothing including suitable air breathing mask and safety belts should be made compulsory. All safety equipment should be checked regularly and maintained properly. 8.7 Clothing — Cotton overalls with full sleeves, safety shoes, goggles and PVC gloves should be used as protective equipment by all operating personnel working in the area having high concentration of vinyl chloride. Protective clothing of each worker should be kept clean and separate in an individual locker. Suitable cloakroom and change rooms with adequate light and ventilation should be provided. Sufficient shower bath should be provided in work-place. 8.8 Employee Education and Training — Safety in handling vinyl chloride depends to a great extent upon the effectiveness of employee education, proper job instruction, intelligent supervision and practice of safe procedures. Employees should be constantly told about the hazard and areas of potential danger. Sign boards indicating suitable procedures for handling equipment and use of personal protective, equipment should be displayed at appropriate work places.

8

IS : 9786 - 1981 9. FIRST AID 9.1 Inha la t ion — If a person shows signs of acute illness after exposure to vinyl chloride, the following measures should be taken:

a) T h e patient should be removed immediately to a clean environ­ment;

b) A physician/trained nurse on duty should be called; c) Artificial respiration if breathing has stopped should he started;

and d) If breathing is difficult, oxygen should be administered by an

authorised first aider. 9.2 Con tac t w i t h Eyes and Skin — If vinyl chloride has gone into the eyes, wash them at once with plenty of water. Remove soaked clothing at once and wash contaminated skin with water. Consult physician.

10. ENVIRONMENTAL M O N I T O R I N G 10.1 Environmental monitoring should be carried out at different work places on regular basis to detect vinyl chloride concentration ( see I S : 9679-1980* ) . 10.2 Complete and accurate records of all environmental measurements shall be maintained.

11. MEDICAL CHECK-UP 11.1 Before the employee is given the assignment a general physical examination shall be performed, with specific attention to detect enlarge­ment of liver, spleen or kidneys or malfunctioning of these organs, and for abnormalities in skin, connective tissues and the pulmonary system. A medical history shall be kept including the following:

a) alcohol intake, b) past history of hepatitis, and c) work history and past exposure to potential hepato-toxic agents

including drugs and chemicals.

11.1.1 A serum specimen shall also be obtained and determination made of the following:

a) Tota l bilirubin, b) Serum glutamic oxaloacetic transaminase, c) Serum glutamic pyruvic transaminase, d) Alkaline phosphatase, and e) G a m m a Glutamyl transpeptitase ( G G T P ) test and estimation

by grey scale ultrasonography.

11.2 Examination in accordance with 11.1 shall be performed at least every 6 months for each employee, who has been employed in vinyl chloride manufacturing for 10 years or longer, and annually for all other employees.

*Code of practice for work environment monitoring ( air-borne contaminants ). 9

IS : 9786 - 1981

( Continued from page 2 ) Members

SHRI A. N. RAO

SHRI V. V. M. RAO

Representing Directorate General of Technical Development,

New Delhi Hindustan Petroleum Corporation, Bombay

SHRI D . V. A. R A J U ( Alternate ) S H R I D E E P A K R . SHAH

SHRI S . S . KAIMAL ( Alternate ) S H R I K . K . SUBRAMANIAN

Excel Industries Ltd, Bombay

National Organic Chemical Industries Ltd, Bombay SHRI M . C. PATWARDHAN ( Alternate )

SHRI S. A. TRIVEDI Navin Fluorine Industries, Bombay SHRI J. N. PAREKH ( Alternate )

SHRI H. K. VENKATARAMIAH Hindustan Organic Chemicals Ltd, Rasayani SHRI A. G. SHESHAN ( Alternate )

10

INTERNATIONAL SYSTEM OF UNITS (SI UNITS) Base Units

QUANTITY

Length Mass Time Electric current Thermodynamic

temperature Luminous intensity Amount of substance

Supp lemen ta ry Uni t s

QUANTITY

Plane angle Solid angle

Derived Units

QUANTITY

Force Energy Power Flux Flux density Frequency Electric conductance Electromotive force Pressure, stress

U N I T

metre kilogram second ampere kelvin

candela mole

U N I T

dian radian

U N I T

newton joule watt weber tesla hertz Siemens volt pascal

SYMBOL

m kg s A K

cd mol

SYMBOL

rad sr

SYMBOL

N J W Wb T Hz S V Pa

DEFINITION

1 N = 1 kg.m/s2

1 J = 1 N.m 1 W = l J/s 1 Wb = 1 V.s 1 T = 1 Wb/m2

1 Hz = 1 c/s (s - 1) 1 S = 1 A/V 1 V = 1 W/A 1 Pa = 1 N/m2

INDIAN STANDARDS INSTITUTION Manak Bhavan, 9 Bahadur Shah Zafar Marg, NEW DELHI 110002 Telephones: 26 60 21, 27 01 31 Telegrams : Manaksanstha Regional Offices: Western : Novelty Chambers, Grant Road Eastern : 5 Chowringhee Approach Southern: C. I. T. Campus, Adyar Branch Offices: 'Pushpak', Nurmohamed Shaikh Marg, Khanpur 'F' Block, Unity Bldg, Narasimharaja Square Gangotri Complex, Bhadbhada Road, T.T. Nagar 22E Kalpana Area Ahimsa BIdg, SCO 82-83, Sector 17C 5-8-56C L. N. Gupta Marg R 14 Yudhister Marg, C Scheme 117/418 B Sarvodaya Nagar Patliputra Industrial Estate Hantex Bldg ( 2nd Floor ), Rly Station Road

Telephone BOMBAY 400007 37 97 29 CALCUTTA 700072 27 50 90 MADRAS 600020 41 24 42

AHMADABAD 380001 2 03 91 BANGALORE 560002 2 76 49 BHOPAL 462003 6 27 16 BHUBANESHWAR 761014 6 36 27 CHANDIGARH 160017 2 83 20 HYDERABAD 500001 22 10 83 JAIPUR 302005 6 98 32 KANPUR 208005 8 12 72 PATNA 800013 6 28 08 TRIVANDRUM 695001 32 27

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