Azinphos-methyl

Synonyms & Trade Names

O,O-Dimethyl-S-4-oxo-1,2,3-benzotriazin-3(4H)-ylmethyl phosphorodithioate, Guthion®, Methyl azinphos

CAS No.

86-50-0

RTECS No.

TE1925000

DOT ID & Guide

2783 152(organophosphorus pesticide, solid, toxic)

Formula

C₁₀H₁₂O₃PS₂N₃ [(CH₃O)₂P(S)SCH₂(N₃C₇H₄O)]

Conversion

IDLH

10 mg/m³
See: 86500

Exposure Limits

NIOSH REL

TWA 0.2 mg/m³ [skin]

OSHA PEL

TWA 0.2 mg/m³ [skin]

Measurement Methods

NIOSH 5600;
OSHA PV2087
See: NMAM or OSHA Methods

Physical Description

Colorless crystals or a brown, waxy solid. [insecticide]

Molecular Weight

317.3

Boiling Point

Decomposes

Melting Point

163°F

Solubility

0.003%

Vapor Pressure

8 x 10^-9 mmHg

Ionization Potential

Specific Gravity

1.44

Flash Point

Upper Explosive Limit

Lower Explosive Limit

Noncombustible solid

Incompatibilities & Reactivities

Strong oxidizers, acids

Exposure Routes

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

Symptoms

Miosis; ache eyes; blurred vision, lacrimation (discharge of tears), rhinorrhea (discharge of thin nasal mucus); headache; chest tightness, wheezing, laryngeal spasm; salivation; cyanosis; anorexia; nausea, vomiting, diarrhea; sweating; twitching, paralysis, convulsions; low blood pressure, cardiac irreg

Target Organs

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:Daily
Provide: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 2 mg/m³:
(APF = 10) Any air-purifying half-mask respirator with organic vapor cartridge(s) in combination with an N95, R95, or P95 filter. The following filters may also be used: N99, R99, P99, N100, R100, P100.
Click here for information on selection of N, R, or P filters.
(APF = 10) Any supplied-air respirator

Up to 5 mg/m³:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 25) Any powered, air-purifying respirator with an organic vapor cartridge in combination with a high-efficiency particulate filter.

Up to 10 mg/m³:
(APF = 50) Any air-purifying full-facepiece respirator equipped with organic vapor cartridge(s) in combination with an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
(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.
(APF = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and organic vapor cartridge(s) in combination with a high-efficiency particulate filter
(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

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

Azinphos-methyl

NIOSH REL

OSHA PEL

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