Safety Data Sheet 0001
Asphyxiant (+H2S +COS +Methyl, Ethyl & n-Propyl mercaptan) 0004
MSDS Nr : 300-10-0104BOC(U) Version : 1.01 Date : 21/07/2000 0006
BOC, Priestley Road, Worsley, Manchester M28 2UT 0800 02 0800 0009
1 IDENTIFICATION OF THE SUBSTANCE/PREPARATION AND OF THE COMPANY 0019
Product name Asphyxiant (+H2S +COS +Methyl, Ethyl & n-Propyl mercaptan) 0110
Company identification see heading and/or footer 0111
Emergency phone numbers see heading and/or footer 0112
2 COMPOSITION/INFORMATION ON INGREDIENTS 0115
Substance/Preparation Preparation 0116
Components/Impurities Contains between 0% and 1% of Hydrogen sulphide {F+;R12|T+;R26|N;R50} 0117
Contains between 0% and 0.5% of Carbonyl sulphide {F+;R12|T;R23} 0118
Contains between 0% and 5% of Methyl mercaptan {F+;R12|Xn;R20} 0119
Contains between 0% and 5% of Ethyl mercaptan {F;R11|Xn;R20} 0210
Contains between 0% and 5% of n-Propyl mercaptan {F;R11|Xn;R22|Xi;R36/38} 0211
EEC Nr (from EINECS) Not applicable for preparations 0212
3 HAZARDS IDENTIFICATION 0215
Hazards identification In high concentrations may cause asphyxiation. 0216
Compressed gas 0217
4 FIRST AID MEASURES 0310
Inhalation In high concentrations may cause asphyxiation. Symptoms may include loss of mobility/consciousness.
Victim may not 0311
be aware of asphyxiation. 0312
Remove victim to uncontaminated area wearing self contained breathing apparatus. Keep victim warm and rested.
Call a doctor. 0313
Apply artificial respiration if breathing stopped. 0314
Delayed adverse effects possible. 0315
Ingestion Ingestion is not considered a potential route of exposure. 0316
5 FIRE FIGHTING MEASURES 0319
Specific hazards Exposure to fire may cause containers to rupture/explode. 0410
Non flammable 0411
Hazardous combustion products If involved in a fire the following toxic and/or corrosive fumes may be produced by
thermal 0412
decomposition: 0413
Sulphur dioxide 0414
Carbon monoxide 0415
Suitable extinguishing media All known extinguishants can be used. 0416
Specific methods If possible, stop flow of product. 0417
Move away from the container and cool with water from a protected position. 0418
Special protective equipment for fire fighters Use self-contained breathing apparatus. 0419
6 ACCIDENTAL RELEASE MEASURES 0512
Personal precautions Evacuate area. 0513
Wear self-contained breathing apparatus when entering area unless atmosphere is proved to be safe. 0514
Ensure adequate air ventilation. 0515
Environmental precautions Try to stop release. 0516
Clean up methods Ventilate area. 0517
7 HANDLING AND STORAGE 0610
Handling and storage Suck back of water into the container must be prevented. 0611
Do not allow backfeed into the container. 0612
Use only properly specified equipment which is suitable for this product, its supply pressure and temperature.
Contact your 0613
gas supplier if in doubt. 0614
Refer to supplier's container handling instructions. 0615
Keep container below 50°C in a well ventilated place. 0616
8 EXPOSURE CONTROLS/PERSONAL PROTECTION 0029
Exposure limit value for country UK: Hydrogen sulphide - LTEL: 10ppm; STEL:15ppm (EH40/2000) 0120
Germany: Hydrogen sulphide - MAK: 10ppm 0121
France: Hydrogen sulphide - VLE: 10ppm; VME: 5ppm 0122
UK: Methyl mercaptan - LTEL: 0.5ppm (EH40/2000) 0123
Germany: Methyl mercaptan - MAK:0.5ppm 0124
UK: Ethyl mercaptan - LTEL: 0.5ppm; STEL: 2ppm (EH40/2000) 0125
Germany: Ethyl mercaptan - MAK:0.5ppm 0126
Personal protection Ensure adequate ventilation. 0127
Do not smoke while handling product. 0128
9 PHYSICAL AND CHEMICAL PROPERTIES 0221
Relative density, gas Lighter or similar to air 0222
Solubility mg/l water No reliable data available. 0223
Appearance/Colour Colourless gas 0224
Odour Extremely disagreeable 0225
Odour can persist. 0226
10 STABILITY AND REACTIVITY 0229
Stability and reactivity Stable under normal conditions. 0320
Thermal decomposition yields toxic products which can be corrosive in the presence of moisture. 0321
11 TOXICOLOGICAL INFORMATION 0324
General Hydrogen sulphide - Damage to central nervous system. / Delayed fatal pulmonary oedema possible. 0325
Carbonyl sulphide - May cause irritation to the respiratory tract./Damage to central nervous system. 0326
Methyl mercaptan - May cause irritation to the respiratory tract./Damage to central nervous system. 0327
Ethyl mercaptan - May cause irritation to the respiratory tract./Damage to central nervous system. 0328
n-Propyl mercaptan - Harmful by inhalation./Irritation to eyes, skin and respiratory tract. 0329
LC50/1h (ppm) Hydrogen sulphide - 712 0420
Carbonyl sulphide - 1700 0421
Methyl mercaptan - 1350 0422
Ethyl mercaptan - 8840 0423
12 ECOLOGICAL INFORMATION 0426
General Hydrogen sulphide - Toxic to water organisms. 0427
Carbonyl sulphide - Toxic to water organisms./Endangering to drinking water. 0428
13 DISPOSAL CONSIDERATIONS 0521
General Avoid discharge to atmosphere. 0522
Do not discharge into any place where its accumulation could be dangerous. 0523
Contact supplier if guidance