Phosdrin

Synonyms & Trade Names

2-Carbomethoxy-1-methylvinyl dimethyl phosphate, Mevinphos [Note: Commercial product is a mixture of the cis- & trans-isomers.]

CAS No.

7786-34-7

RTECS No.

GQ5250000

DOT ID & Guide

2783 152

Formula

C₇H₁₃PO₆

Conversion

1 ppm = 9.17 mg/m³

IDLH

4 ppm
See: 7786347

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] See Appendix G

Measurement Methods

NIOSH 5600
See: NMAM or OSHA Methods

Physical Description

Pale-yellow to orange liquid with a weak odor. [Note: Insecticide that may be absorbed on a dry carrier.]

Molecular Weight

224.2

Boiling Point

Decomposes

Freezing Point

44°F (trans-) 70°F (cis-)

Solubility

Miscible

Vapor Pressure

0.003 mmHg

Ionization Potential

Specific Gravity

1.25

Flash Point

(oc) 347°F

Upper Explosive Limit

Lower Explosive Limit

Class IIIB Combustible Liquid: Fl.P. at or above 200°F.

Incompatibilities & Reactivities

Strong oxidizers [Note: Corrosive to cast iron, some stainless steels & brass.]

Exposure Routes

inhalation, skin absorption, ingestion, skin and/or eye contact

Symptoms

irritation eyes, skin, respiratory system; miosis; rhinorrhea (discharge of thin nasal mucus); headache; chest tightness, wheezing, laryngeal spasm, salivation, cyanosis; anorexia, nausea, vomiting, abdominal cramps, diarrhea; paralysis; ataxia, convulsions; low blood pressure, cardiac irreg

Target Organs

Eyes, skin, respiratory system, central nervous system, cardiovascular system, blood cholinesterase

Personal Protection/Sanitation

(See protection codes)
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 an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus

Important additional information about respirator selection

Phosdrin

NIOSH REL

OSHA PEL

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