NIOSH Pocket Guide to Chemical Hazards

Phosdrin CAS 7786-34-7
C7H13PO6 RTECS GQ5250000
Synonyms & Trade Names
2-Carbomethoxy-1-methylvinyl dimethyl phosphate, Mevinphos [Note: Commercial product is a mixture of the cis- & trans-isomers.]
DOT ID & Guide
2783 152
Exposure
Limits
NIOSH REL: TWA 0.01 ppm (0.1 mg/m3) ST 0.03 ppm (0.3 mg/m3) [skin]
OSHA PEL�: TWA 0.1 mg/m3 [skin]
IDLH 4 ppm Conversion 1 ppm = 9.17 mg/m3
Physical Description
Pale-yellow to orange liquid with a weak odor. [Note: Insecticide that may be absorbed on a dry carrier.]
MW: 224.2
BP: Decomposes
FRZ: 44°F (trans-) 70°F (cis-)
Sol: Miscible
VP: 0.003 mmHg
IP: ?

Sp.Gr: 1.25
Fl.P(oc): 347°F
UEL: ?
LEL: ?

Class IIIB Combustible Liquid: Fl.P. at or above 200�F.
Incompatibilities & Reactivities
Strong oxidizers [Note: Corrosive to cast iron, some stainless steels & brass.]
Measurement Methods
NIOSH 5600
Personal Protection & Sanitation
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: No recommendation
Provide: Eyewash, Quick drench
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately
Respirator Recommendations NIOSH/OSHA
Up to 0.1 ppm: (APF = 10) Any supplied-air respirator
Up to 0.25 ppm: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode
Up to 0.5 ppm: (APF = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode/(APF = 50) Any self-contained breathing apparatus with a full facepiece/(APF = 50) Any supplied-air respirator with a full facepiece
Up to 4 ppm: (APF = 1000) Any supplied-air respirator operated in a pressure-demand or other positive-pressure mode
Emergency or planned entry into unknown concentrations or IDLH conditions: (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
Escape: (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted organic vapor canister having a high-efficiency particulate filter/Any appropriate escape-type, self-contained breathing apparatus
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact
Symptoms Irritation eyes, skin, respiratory system; miosis; rhinorrhea (discharge of thin mucus); headache; chest tightness, wheezing, laryngeal spasm, salivation, cyanosis; anorexia, nausea, vomiting, abdominal cramps, diarrhea; paralysis; ataxia, convulsions; low blood pressure, cardiac irregularities
Target Organs Eyes, skin, respiratory system, central nervous system, cardiovascular system, blood cholinesterase
See also: INTRODUCTION