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Chemical Datasheet
CHLOROPICRIN AND METHYL CHLORIDE MIXTURE |
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Chemical Identifiers
CAS Number |
UN/NA Number |
DOT Hazard Label |
USCG CHRIS Code |
- 76-06-2
- 74-87-3
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|
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none
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NIOSH Pocket Guide |
International Chem Safety Card |
Chloropicrin
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- METHYL CHLORIDE
- TRICHLORONITROMETHANE
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NFPA 704
General Description
Chloropicrin and methyl chloride mixture is a colorless gas with an intense, penetrating odor. It is shipped as a liquefied gas under its own vapor pressure. Methyl chloride is a flammable gas and chloropicrin is noncombustible. The mixture can separate with the chloropicrin settling into low areas. The mixture is very toxic by inhalation. Prolonged exposure of the containers to fire or heat may result in their violent rupturing and rocketing.
Hazards
Reactivity Alerts
Air & Water Reactions
Slowly decomposes in water.
Fire Hazard
Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]:
Flammable; may be ignited by heat, sparks or flames. May form explosive mixtures with air. Ethylene oxide (UN1040) may react explosively even in the absence of air. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Some of these materials may react violently with water. Cylinders exposed to fire may vent and release toxic and flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket. Runoff may create fire or explosion hazard. (ERG, 2024)
Health Hazard
Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]:
TOXIC; may be fatal if inhaled or absorbed through skin. Some may cause severe skin burns and eye damage. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause environmental contamination. (ERG, 2024)
Reactivity Profile
CHLOROPICRIN is a powerful irritant affecting all body surfaces, more toxic than chlorine. It can be shocked into detonation. When heated to decomposition, it emits highly toxic fumes of chlorine gas and nitrogen oxides [Sax, 9th ed., 1996, p. 821]. It produces a violent reaction with aniline [Jackson, K. E., Chem. Rev., 1934, 14, p. 269] or strong bases in the presence of alcohols (alkoxides) [ Ramsey, B. G., et al., J. Am. Chem. Soc., 1966, 88, p. 3059].
METHYL CHLORIDE can react vigorously with oxidizing agents. May react explosively with sodium, potassium, sodium-potassium alloy, magnesium, zinc. Reacts with aluminum powder in the presence of catalytic amounts of aluminum chloride to form pyrophoric trimethylaluminum. When heated to decomposition, it emits highly toxic fumes of chlorine [Bretherick, 5th ed., 1995, p. 176].
Belongs to the Following Reactive Group(s)
- Halogenated Organic Compounds
- Nitro, Nitroso, Nitrate, and Nitrite Compounds, Organic
Potentially Incompatible Absorbents
Use caution: Liquids with this reactive group classification have been
known to react with the
absorbents
listed below.
- Cellulose-Based Absorbents
- Expanded Polymeric Absorbents
Response Recommendations
Isolation and Evacuation
Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]:
IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
SPILL: See ERG Table 1 - Initial Isolation and Protective Action Distances on the UN/NA 1582 datasheet.
FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 1600 meters (1 mile) in all directions; also, consider initial evacuation for 1600 meters (1 mile) in all directions. (ERG, 2024)
Firefighting
Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]:
DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED.
SMALL FIRE: Dry chemical, CO2, water spray or alcohol-resistant foam.
LARGE FIRE: Water spray, fog or alcohol-resistant foam. FOR CHLOROSILANES, DO NOT USE WATER; use alcohol-resistant foam. If it can be done safely, move undamaged containers away from the area around the fire. Damaged cylinders should be handled only by specialists.
FIRE INVOLVING TANKS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Do not direct water at source of leak or safety devices; icing may occur. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. (ERG, 2024)
Non-Fire Response
Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]:
ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Do not direct water at spill or source of leak. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. FOR CHLOROSILANES, use alcohol-resistant foam to reduce vapors. If possible, turn leaking containers so that gas escapes rather than liquid. Prevent entry into waterways, sewers, basements or confined areas. Isolate area until gas has dispersed. (ERG, 2024)
Protective Clothing
Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]:
Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer when there is NO RISK OF FIRE. Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. (ERG, 2024)
DuPont Tychem® Suit Fabrics
Normalized Breakthrough Times (in Minutes)
Chemical |
CAS Number |
State |
QS |
QC |
SL |
C3 |
TF |
TP |
RC |
TK |
RF |
Chlor trinitromethan |
76-06-2 |
Liquid |
|
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|
|
>480 |
>480 |
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|
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Chloro picrin |
76-06-2 |
Liquid |
|
|
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|
>480 |
>480 |
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|
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Nitro chlormethan |
76-06-2 |
Liquid |
|
|
|
|
>480 |
>480 |
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Methyl chloride (-70°C, liquid) |
74-87-3 |
Liquid |
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>180 |
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Methyl chloride (gaseous) |
74-87-3 |
Vapor |
|
imm |
>480 |
>480 |
>480 |
>480 |
>480 |
>480 |
>480 |
Special Warning from DuPont: Tychem® and Tyvek® fabrics should not be
used around heat, flames, sparks or in potentially flammable or
explosive environments. Only...
(DuPont, 2024)
First Aid
Excerpt from ERG Guide 119 [Gases - Toxic - Flammable]:
Refer to the "General First Aid" section. Specific First Aid: In case of contact with liquefied gas, only medical personnel should attempt thawing frosted parts. In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin. (ERG, 2024)
Physical Properties
Flash Point: data unavailable
Lower Explosive Limit (LEL): data unavailable
Upper Explosive Limit (UEL): data unavailable
Autoignition Temperature: data unavailable
Melting Point: data unavailable
Vapor Pressure: data unavailable
Vapor Density (Relative to Air): data unavailable
Specific Gravity: data unavailable
Boiling Point: data unavailable
Molecular Weight: data unavailable
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH:
2 ppm
[From NPG: Chloropicrin]
(NIOSH, 2024)
AEGLs (Acute Exposure Guideline Levels)
Final AEGLs for Methyl chloride (74-87-3)
Exposure Period |
AEGL-1 |
AEGL-2 |
AEGL-3 |
10 minutes |
NR |
1100 ppm |
3800 ppm |
30 minutes |
NR |
1100 ppm |
3800 ppm |
60 minutes |
NR |
910 ppm |
3000 ppm |
4 hours |
NR |
570 ppm |
1900 ppm |
8 hours |
NR |
380 ppm |
1300 ppm |
(NAC/NRC, 2024)
Interim AEGLs for Chloropicrin (76-06-2)
Exposure Period |
AEGL-1 |
AEGL-2 |
AEGL-3 |
10 minutes |
0.05 ppm |
0.15 ppm |
2 ppm |
30 minutes |
0.05 ppm |
0.15 ppm |
2 ppm |
60 minutes |
0.05 ppm |
0.15 ppm |
1.4 ppm |
4 hours |
0.05 ppm |
0.15 ppm |
0.79 ppm |
8 hours |
0.05 ppm |
0.15 ppm |
0.58 ppm |
(NAC/NRC, 2024)
ERPGs (Emergency Response Planning Guidelines)
Chemical |
ERPG-1 |
ERPG-2 |
ERPG-3 |
Chloropicrin (76-06-2)
|
0.075 ppm |
0.15 ppm |
1.5 ppm |
Methyl Chloride (74-87-3)
|
150 ppm  |
1000 ppm |
3000 ppm |
(AIHA, 2022)
PACs (Protective Action Criteria)
Chemical |
PAC-1 |
PAC-2 |
PAC-3 |
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Chloropicrin; (Trichloronitromethane) (76-06-2)
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0.05 ppm |
0.15 ppm |
1.4 ppm |
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Methyl chloride (74-87-3)
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150 ppm |
910 ppm |
3000 ppm |
LEL = 81000 ppm |
(DOE, 2024)
Regulatory Information
EPA Consolidated List of Lists
Regulatory Name |
CAS Number/ 313 Category Code |
EPCRA 302 EHS TPQ |
EPCRA 304 EHS RQ |
CERCLA RQ |
EPCRA 313 TRI |
RCRA Code |
CAA 112(r) RMP TQ |
Chloromethane |
74-87-3 |
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100 pounds |
313 |
U045 |
10000 pounds |
Chloropicrin |
76-06-2 |
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313 |
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Methane, chloro- |
74-87-3 |
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100 pounds |
X |
U045 |
10000 pounds |
Methyl chloride |
74-87-3 |
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100 pounds |
X |
U045 |
10000 pounds |
(EPA List of Lists, 2024)
CISA Chemical Facility Anti-Terrorism Standards (CFATS)
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RELEASE |
THEFT |
SABOTAGE |
Chemical of Interest |
CAS Number |
Min Conc |
STQ |
Security Issue |
Min Conc |
STQ |
Security Issue |
Min Conc |
STQ |
Security Issue |
Methyl chloride; [Methane, chloro-] |
74-87-3 |
1.00 % |
10000 pounds |
flammable |
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(CISA, 2007)
OSHA Process Safety Management (PSM) Standard List
Chemical Name |
CAS Number |
Threshold Quantity (TQ) |
Chloropicrin |
76-06-2 |
500 pounds |
Chloropicrin and Methyl Chloride mixture |
None |
1500 pounds |
Methyl Chloride |
74-87-3 |
15000 pounds |
(OSHA, 2019)
Alternate Chemical Names
- CHLOROPICRIN AND METHYL CHLORIDE MIXTURE
- CHLOROPICRIN-METHYL CHLORIDE MIXTURE
- METHYL CHLORIDE AND CHLOROPICRIN MIXTURES