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Diamond	Hazard	Value	Description
1 4 3	Health	4	Can be lethal.
	Flammability	1	Must be preheated before ignition can occur.
	Instability	3	Capable of detonation or explosive decomposition or explosive reaction but requires a strong initiating source or must be heated under confinement before initiation.
	Special

A colorless gas with an intense, penetrating odor. Shipped as a liquefied gas under own vapor pressure. Methyl bromide is nonflammable, and chloropicrin is noncombustible. The mixture may separate with the chloropicrin settling into low areas. Chloropicrin is very irritating to skin and eyes. Inhalation may result in adverse health effects. Under prolonged exposure to fire or intense heat the container may violently rupture and rocket.

• Explosive

Slowly decomposes in water.

Excerpt from ERG Guide 123 [Gases - Toxic]:

Some may burn but none ignite readily. Vapors from liquefied gas are initially heavier than air and spread along ground. Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket. (ERG, 2024)

Excerpt from ERG Guide 123 [Gases - Toxic]:

TOXIC; may be fatal if inhaled or absorbed through skin. Vapors may be irritating and/or corrosive. 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)

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]. An insecticidal mixture of the nitrocompound and 3-bromopropyne exploded violently, initiated by an overheated pump during a railcar transfer operation, [BCISC Quart. Safety Summ., 1968, 39, 12].

METHYL BROMIDE is incompatible with metals, dimethyl sulfoxide, ethylene oxide. [Lewis]. Incompatible with zinc, magnesium and their alloys) [Chem. Eng. Pro. 58(8) 1962]. Can give flammable products if mixed with strong bases such as potassium hydroxide, sodium hydroxide. Reacted with an aluminum tube (part of the level gauge) while confined in a steel tank to produce methyl aluminum bromide. When the latter was subsequently exposed to air, enough heat was produced to ignite the methyl bromide/air vapor mixture above the liquid. The ensuing explosion shattered the tank. Exploded with dimethyl sulfoxide [NFPA 491M. 1991].

• Halogenated Organic Compounds
• Nitro, Nitroso, Nitrate, and Nitrite Compounds, Organic

Use caution: Liquids with this reactive group classification have been known to react with the absorbents listed below.

• Cellulose-Based Absorbents
• Expanded Polymeric Absorbents

Excerpt from ERG Guide 123 [Gases - Toxic]:

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 1581 datasheet.

FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)

Excerpt from ERG Guide 123 [Gases - Toxic]:

SMALL FIRE: Dry chemical or CO2.

LARGE FIRE: Water spray, fog or regular foam. Do not get water inside containers. 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)

Excerpt from ERG Guide 123 [Gases - Toxic]:

Do not touch or walk through spilled material. Stop leak if you can do it without risk. If possible, turn leaking containers so that gas escapes rather than liquid. Prevent entry into waterways, sewers, basements or confined areas. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. Do not direct water at spill or source of leak. Isolate area until gas has dispersed. (ERG, 2024)

Excerpt from ERG Guide 123 [Gases - Toxic]:

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)

Normalized Breakthrough Times (in Minutes)

Chemical	CAS Number	State	QS	QC	SL	C3	TF	TP	RC	TK	RF
Chlor trinitromethan	76-06-2	Liquid					>480	>480
Chloro picrin	76-06-2	Liquid					>480	>480
Nitro chlormethan	76-06-2	Liquid					>480	>480

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Excerpt from ERG Guide 123 [Gases - Toxic]:

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. (ERG, 2024)

• AGEL TG 37
• AGEL TG 67
• BROZONE
• CHLOROPICRIN AND METHYL BROMIDE MIXTURE
• CHLOROPICRIN-METHYL BROMIDE MIXT.
• CYLON
• DOWFUME MC 2
• DOWFUME MC 33
• MBC
• MBC 33
• METHANE, BROMO-, MIXT. CONTAINING
• METHYL BROMIDE AND CHLOROPICRIN MIXTURE
• METHYL BROMIDE-CHLOROPICRIN MIXT.
• METILFUM
• TERR-O-GAS
• TERR-O-GEL
• VERTAFUME