MATERIAL SAFETY DATA SHEET
PRODUCT NAME: CARBONYL SULFIDE (0-5%) IN NITROGEN
1. Chemical Product and Company Identification
BOC Gases, BOC Gases
Division of Division of
The BOC Group, Inc. BOC Canada Limited
575 Mountain Avenue 5975 Falbourne Street, Unit 2
Murray Hill, NJ 07974 Mississauga, Ontario L5R 3W6
TELEPHONE NUMBER: (908) 464-8100 TELEPHONE NUMBER: (905) 501-1700
24-HOUR EMERGENCY TELEPHONE NUMBER: 24-HOUR EMERGENCY TELEPHONE NUMBER:
CHEMTREC (800) 424-9300 (905) 501-0802
EMERGENCY RESPONSE PLAN NO: 20101
PRODUCT NAME: CARBONYL SULFIDE (0-5%) IN NITROGEN
CHEMICAL NAME: Gas Mixture
COMMON NAMES/SYNONYMS: None
TDG (Canada) CLASSIFICATION: A, D2B
WHMIS CLASSIFICATION: 2.2
PREPARED BY: Loss Control (908)464-8100/(905)501-1700
PREPARATION DATE: 6/1/95
REVIEW DATES: 6/21/96
2. Composition, Information on Ingredients
PEL-OSHA1 TLV-ACGIH2
INGREDIENT % VOLUME LD50 or LC50
Route/Species
Nitrogen 95-100 Not Available Not Available Simple asphyxiant
FORMULA: N2
CAS: 7727-37-0
RTECS #: QW9700000
Carbonyl Sulfide 0-5 Not Available Not Available LC50: 2270
mg/m3
FORMULA: COS
CAS: 463-58-1 inhalation/rat
RTECS #: FG6400000
1
As stated in 29 CFR 1910, Subpart Z (revised July 1, 1993)
2
As stated in the ACGIH 1994-95 Threshold Limit Values for Chemical Substances and Physical Agents
3. Hazards Identification
EMERGENCY OVERVIEW
Colorless gas with characteristic rotten egg odor which may cause eye, skin and respiratory irritation.
This product contains carbonyl sulfide, which in sufficient concentrations can cause acute respiratory
failure and death. High concentrations of gas may accumulate in confined or poorly ventilated areas
causing respiratory failure or asphyxiation. Use only with adequate ventilation. Contents under
pressure. Avoid heat and flames. Protect containers from physical damage.
MSDS: G273
Revised: 2/21/96 Page 1 of 6
PRODUCT NAME: CARBONYL SULFIDE (0-5%) IN NITROGEN
ROUTE OF ENTRY:
Skin Contact Skin Absorption Eye Contact Inhalation Ingestion
Yes No Yes Yes No
HEALTH EFFECTS:
Exposure Limits Irritant Sensitization
No Yes No
Teratogen Reproductive Hazard Mutagen
No No No
Synergistic Effects
None known
Carcinogenicity: -- NTP: No IARC: No OSHA: No
EYE EFFECTS:
Contact may cause irritation. Low to moderately high vapor concentrations of carbonyl sulfide can cause light
sensitivity, tears, corneal opacity and painful conjunctivitis.
SKIN EFFECTS:
Contact may cause skin irritation and redness.
INGESTION EFFECTS:
Accidental ingestion is unlikely as at ambient temperature and pressure (STP) this product is a gas.
INHALATION EFFECTS:
Release of sufficient quantities may cause asphyxiation or suffocation by displacing oxygen content in the air.
Symptoms of asphyxiation may begin with decreased night vision followed by decreased alertness, air hunger,
fatigue, dizziness, headache, and decreased coordination. Carbonyl sulfide is hydrolyzed by water to carbon
dioxide and hydrogen sulfide. Exposure to greater than 500 ppm hydrogen sulfide can result in respiratory
paralysis and death within 30 to 60 minutes. Concentrations of 0.1 volume percent (1000 ppm) carbonyl sulfide
and higher produce death in 2 hours or less.
MEDICAL CONDITIONS AGGRAVATED BY EXPOSURE: None known
NFPA HAZARD CODES HMIS HAZARD CODES RATINGS SYSTEM
Health: 2 (3, as COS) Health: 2 (3, as COS) 0 = No Hazard
Flammability: 0 (4, as COS) Flammability: 0 (4, as COS) 1 = Slight Hazard
Reactivity: 1 Reactivity: 1 2 = Moderate Hazard
3 = Serious Hazard
4 = Severe Hazard
4. First Aid Measures
EYES:
Flush eyes with large amounts of water for at least 15 minutes. If irritation persists, seek medical attention.
SKIN:
Remove contaminated clothing and wash affected area with large amounts of soap and water. If irritation
persists, seek medical attention.
INGESTION:
Product is a gas.
INHALATION:
MSDS: G273
Revised: 2/21/96 Page 2 of 6
PRODUCT NAME: CARBONYL SULFIDE (0-5%) IN NITROGEN
PROMPT MEDICAL ATTENTION IS MANDATORY IN ALL CASES OF OVEREXPOSURE. RESCUE
PERSONNEL SHOULD BE EQUIPPED WITH SELF-CONTAINED BREATHING APPARATUS.
Conscious persons should be assisted to an uncontaminated area and inhale fresh air. Quick removal from the
contaminated area is most important. If breathing is difficult, administer oxygen. If breathing has stopped, give
artificial respiration. Seek immediate medical attention.
5. Fire Fighting Measures
Conditions of Flammability: Not flammable
Flash point: Method: Autoignition
None Not Applicable Temperature: None
LEL(%): None (12 for carbonyl sulfide) UEL(%): None (28.5 for carbonyl sulfide)
Hazardous combustion products: COx and hydrogen sulfide
Sensitivity to mechanical shock: None
Sensitivity to static discharge: None
FIRE AND EXPLOSION HAZARDS:
The majority of this product constitutes a nonflammable, inert gas. Containers may explode when exposed to
heat or flames. Carbonyl sulfide is a poison gas. Carbonyl sulfide is hydrolyzed by water to carbon dioxide and
highly toxic hydrogen sulfide.
EXTINGUISHING MEDIA:
Water spray to keep cylinders cool and knock down vapors. Use extinguishing agent appropriate for the
combustible material.
FIRE FIGHTING INSTRUCTIONS:
Continue to cool heat or flame exposed containers until well after flames are extinguished. Firefighters should
wear a full-facepiece, NIOSH/MSHA-approved self-contained breathing apparatus (SCBA) operated in positive
pressure mode and full turnout gear with appropriate chemical protective clothing.
6. Accidental Release Measures
Evacuate all personnel from affected area. Use appropriate protective equipment including respiratory
protection for high or unknown concentrations. Personnel should not re-enter hazard area until carbonyl sulfide
is dispersed and adequate atmospheric oxygen is re-established. If leak is in user鈥檚 equipment, be certain to
purge piping with inert gas prior to attempting repairs. If leak is in container or container valve, contact the
appropriate emergency telephone number listed in Section 1 or call your closest BOC location.
7. Handling and Storage
Electrical classification:
Non-hazardous
Stationary customer site vessels should operate in accordance with the manufacturer's and BOC鈥檚 instruction.
Do not attempt to repair, adjust or in any other way modify the operation of these vessels. If there is a
malfunction or other type of operations problem with the vessel, contact the closest BOC location immediately.
Valve protection caps must remain in place unless container is secured with valve outlet piped to use point. Do
not drag, slide or roll cylinders. Use a suitable hand truck for cylinder movement. Use a pressure reducing
MSDS: G273
Revised: 2/21/96 Page 3 of 6
PRODUCT NAME: CARBONYL SULFIDE (0-5%) IN NITROGEN
regulator when connecting cylinder to lower pressure (<3000 psig) piping or systems. Do not heat cylinder by
any means to increase the discharge rate of product from the cylinder. Use a check valve or trap in the discharge
line to prevent hazardous back flow into the system.
Protect cylinders from physical damage. Store in cool, dry, well-ventilated area away from heavily trafficked
areas and emergency exits. Do not allow the temperature where cylinders are stored to exceed 130oF (54oC).
Cylinders should be stored upright and firmly secured to prevent falling or being knocked over. Full and empty
cylinders should be segregated. Use a "first in-first out" inventory system to prevent full cylinders being stored
for excessive periods of time.
For additional storage recommendations, consult Compressed Gas Association鈥檚 Pamphlets P-1, P-12, and G-9.
Never carry a compressed gas cylinder or a container of a gas in cryogenic liquid form in an enclosed space such
as a car trunk, van or station wagon. A leak can result in a fire, explosion, asphyxiation or a toxic exposure.
8. Exposure Controls, Personal Protection
EXPOSURE LIMITS1:
PEL-OSHA2 TLV-ACGIH3
INGREDIENT % VOLUME LD50 or LC50
Route/Species
Nitrogen 95-100 Not Available Not Available Simple asphyxiant
FORMULA: N2
CAS: 7727-37-0
RTECS #: QW9700000
Carbonyl Sulfide 0-5 Not Available Not Available LC50: 2270
mg/m3
FORMULA: COS
CAS: 463-58-1 inhalation/rat
RTECS #: FG6400000
1
Refer to individual state of provincial regulations, as applicable, for limits which may be more stringent than
those listed here.
2
As stated in 29 CFR 1910, Subpart Z (revised July 1, 1993)
3
As stated in the ACGIH 1994-1995 Threshold Limit Values for Chemical Substances and Physical Agents.
ENGINEERING CONTROLS:
Use local exhaust ventilation as necessary to control air contaminants and maintain atmospheric oxygen levels
above 19.5%.
RESPIRATORY PROTECTION: Under normal working conditions, none required. When high or unknown
concentrations may be present a NIOSH/MSHA approved full-facepiece SCBA operated in positive pressure
mode should be worn.
EYE/FACE PROTECTION: Goggles are recommended.
SKIN PROTECTION: Protective gloves of suitable material are recommended when direct contact is
anticipated.
OTHER/GENERAL PROTECTION:
Safety shoes
MSDS: G273
Revised: 2/21/96 Page 4 of 6
PRODUCT NAME: CARBONYL SULFIDE (0-5%) IN NITROGEN
9. Physical and Chemical Properties
PARAMETER VALUE UNITS
Physical state (gas, liquid, solid) : Gas
Vapor pressure : Above critical temp.
Vapor density (Air = 1) : Not Available
Evaporation point : Not Available
o
Boiling point : -195.79 C (liquid, as N2)
Freezing point: : Not Available
pH : Not Available
Specific gravity at STP : Not Available
Oil/water partition coefficient : Not Available
Solubility (H20) : Negligible
Odor threshold : Not Available
Odor and appearance : Colorless gas with typical sulfide odor
10. Stability and Reactivity
STABILITY:
Stable under normal conditions and use.
INCOMPATIBLE MATERIALS: Carbonyl sulfide reacts vigorously with oxidizing materials.
HAZARDOUS DECOMPOSITION PRODUCTS:
Decomposition will produce COx and possibly highly toxic hydrogen sulfide.
HAZARDOUS POLYMERIZATION:
Will not occur.
11. Toxicological Information
INHALATION: Signs of asphyxia are generally noted when atmospheric oxygen content is decreased to 15-
16%. The reduction of atmospheric oxygen concentration to 6-8% generally results in unconsciousness leading
to death. Rat inhalation of carbonyl sulfide resulted in an LC50 of 2270 mg/m3 with general anesthetic effects,
convulsions, and ataxia.
SUBCHRONIC: Rabbits continuously exposed to approximately 50 ppm carbonyl sulfide for 1-7 weeks had
no significant changes in myocardial ultrastructure. Rabbits exposed to 50 ppm carbonyl sulfide for seven
weeks exhibited slightly elevated mean serum cholesterol concentration, a small increase in the concentration of
free cholesterol in the aorta and no histopathological changes in the coronary arteries or lungs.
12. Ecological Information
FATE: Release of carbonyl sulfide to soil or water generally results in rapid volatilization to the atmosphere.
Carbonyl sulfide in the atmosphere is expected to have a long residence time with atmospheric half-lives from
experimental rate constants ranging from 500 days to 6.5 years. The estimated atmospheric life-time for
carbonyl sulfide is approximately 2 years based on direct photolysis removal, reaction with hydroxyl radicals
and oxygen, and unknown removal processes invoked to balance the sulfur cycle.
13. Disposal Considerations
MSDS: G273
Revised: 2/21/96 Page 5 of 6
PRODUCT NAME: CARBONYL SULFIDE (0-5%) IN NITROGEN
Do not attempt to dispose of residual waste or unused quantities. Return in the shipping container PROPERLY
LABELED, WITH ANY VALVE OUTLET PLUGS OR CAPS SECURED AND VALVE PROTECTION CAP
IN PLACE to BOC Gases or authorized distributor for proper disposal.
14. Transport Information
PARAMETER United States DOT Canada TDG
Compressed gases, n.o.s. Compressed gas, n.o.s.
PROPER SHIPPING NAME:
(Carbonyl sulfide, Nitrogen)
(Carbonyl sulfide , Nitrogen)
2.2 2.2
HAZARD CLASS:
1956 1956
IDENTIFICATION NUMBER:
NONFLAMMABLE GAS NONFLAMMABLE GAS
SHIPPING LABEL:
15. Regulatory Information
Carbonyl sulfide is listed under the accident prevention provisions of section 112(r) of the Clean Air Act (CAA)
with a threshold quantity (TQ) of 10,000 pounds.
SARA TITLE III NOTIFICATIONS AND INFORMATION
Releases of carbonyl sulfide in quantities equal to or greater than the reportable quantity (RQ) of 1 pounds are
subject to reporting to the National Response Center under CERCLA, Section 304 SARA Title III.
SARA TITLE III - HAZARD CLASSES:
Sudden Release of Pressure Hazard
SARA TITLE III - SECTION 313 SUPPLIER NOTIFICATION:
This product contains the following toxic chemicals subject to the reporting requirements of section 313 of the
Emergency Planning and Community Right-To-Know Act (EPCRA) of 1986 and of 40 CFR 372:
CAS NUMBER INGREDIENT NAME PERCENT BY VOLUME
463-58-1 Carbonyl sulfide 0-5
This information must be included on all MSDSs that are copied and distributed for this material.
16. Other Information
Compressed gas cylinders shall not be refilled without the express written permission of the owner. Shipment of
a compressed gas cylinder which has not been filled by the owner or with his/her (written) consent is a
violation of transportation regulations.
DISCLAIMER OF EXPRESSED AND IMPLIED WARRANTIES:
Although reasonable care has been taken in the preparation of this document, we extend no warranties and make
no representations as to the accuracy or completeness of the information contained herein, and assume no
responsibility regarding the suitability of this information for the user鈥檚 intended purposes or for the
consequences of its use. Each individual should make a determination as to the suitability of the information for
their particular purpose(s).
MSDS: G273
Revised: 2/21/96 Page 6 of 6
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