Chloropicrin

CAS RN:76-06-2

Protective Equip. / Clothing

Currently, there are no air-purifying respirator cartridges certified by(MSHA-NIOSH for protection against chloropicrin. NIOSH/OSHA does recommend respirators with organic vapor cartridges for chloropicrin use. The EPA is requiring half-face respirators with organic cartridges be used when a respirator is necessary. The EPA assumes that half-face respirators have a protection factor of 10, therefore the respiratory protection will only be protective up to chloropicrin concentrations of 1.5 ppm, and if measured concentrations exceed 1.5 ppm work operations must cease. A self-contained breathing apparatus (SCBA) has a protection factor of 1,000, but must only be used for brief durations to take actions to reduce air concentration levels or in case of an emergency. As a result the new IDLH of 2 ppm will not be a trigger to put on SCBA. Respirator APR-cartridge combinations from other manufacturers will also be considered by the /EPA/, provided written certification of their efficiency against chloropicrin is provided.

An air purifying respirator must be worn by handlers performing tarp repair operations before the entry prohibitions have ended.

Employers must also ensure that all handlers are: Fit-tested and fit-checked using a program that conforms to OSHA's requirements (see 29CFR Part 1910.134); Trained using a program that confirms to OSHA's requirements (see 29CFR Part 1910.134); Examined by a qualified medical practitioner to ensure physical ability to safely wear the style of respirator to be worn. ... The initial evaluation consists of a questionnaire that asks about medical conditions (such as a heart condition) that would be problematic for respirator use. If concerns are identified, then additional evaluations, such as a physical exam, might be necessary. The initial evaluation must be done before respirator use begins. It does not need to be repeated unless the health status or respirator use conditions change

... Entry (including early entry that would otherwise be permitted under the WPS) by any person - other than a correctly trained and PPE-equipped handler who is performing a handling task - is prohibited from the start of the application until: 5 days (120 hours) after application has ended for untarped applications, or After tarps are perforated and removed if tarp removal is completed less than 14 days after application, or 48 hours after tarps are perforated if they will not be removed prior to planting, or 5 days (120 hours) after application is complete if tarps are not perforated and removed 14 days after the application is complete.

EPA is requiring registrants through their community outreach and education programs ... to ensure that emergency responders have the training and information that they need to effectively identify and respond to fumigant exposure incidents.

/In emergencies/ The rescuer's protective equipment should be Level A (eg, triple gloves (polyethylene gloves and nitrile gloves over latex gloves), fully encapsulating chemical resistant suit and boots, hard hat, self-contained breathing apparatus). Standard organic vapor filters used with gas masks or air-purifying respirators do not remove chloropicrin effectively.

Chemical resistant apron when cleaning equiptment, mixing or loading. Chemical resistant gloves. Protective eyewear.

If the concentration of chloropicrin in the working area, as measured by a Matheson-Kitigawa detection device using tube 172, does not exceed 0.1 ppm (0.7 mg/cu m), no respiratory protection is required. If concentration is exceeded, all persons in the fumigation area must wear an approved respirator approved for organic vapors, self-contained breathing apparatus (SCBA), or a combination of air supplied/SCBA respirator.

Wear appropriate personal protective clothing to prevent skin contact.

Wear appropriate eye protection to prevent eye contact.

Eyewash fountains should be provided in areas where there is any possibility that workers could be exposed to the substance; this is irrespective of the recommendation involving the wearing of eye protection.

Facilities for quickly drenching the body should be provided within the immediate work area for emergency use where there is a possibility of exposure. (Note: It is intended that these facilities provide a sufficient quantity or flow of water to quickly remove the substance from any body areas likely to be exposed. The actual determination of what constitutes an adequate quick drench facility depends on the specific circumstances. In certain instances, a deluge shower should be readily available, whereas in others, the availability of water from a sink or hose could be considered adequate.)

Respirator Recommendations: Up to 2 ppm

Assigned Protection Factor (APF) Respirator Recommendation
APF = 25 Any supplied-air respirator operated in a continuous-flow mode. Substance causes eye irritation or damage; eye protection needed.
APF = 25 Any powered, air-purifying respirator with organic vapor cartridge(s). Substance causes eye irritation or damage; eye protection needed.
APF = 50 Any chemical cartridge respirator with a full facepiece and organic vapor cartridge(s).
APF = 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister.
APF = 50 Any self-contained breathing apparatus with a full facepiece.
APF = 50 Any supplied-air respirator with a full facepiece.

Respirator Recommendations: Emergency or planned entry into unknown concentrations or IDLH conditions:

Assigned Protection Factor (APF) Respirator Recommendation
APF = 10,000 Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode.
APF = 10,000 Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus.

Respirator Recommendations: Escape conditions:

Assigned Protection Factor (APF) Respirator Recommendation
APF = 50 Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus

Personnel protection: ... Wear positive pressure self-contained breathing apparatus. ... Wear appropriate chemical protective clothing.

Personnel protection: ... Wear positive pressure self-contained breathing apparatus. ... Wear appropriate chemical protective clothing. /Chloropicrin (Toxic liquids, flammable, organic, NOS)/

Wear special protective clothing and positive pressure self-contained breathing apparatus.

Find more information on this substance at: Hazardous Substances Data Bank , TOXMAP , TOXNET , PubMed