Methyl parathion
|
CAS
298-00-0
|
(CH3O)2P(S)OC6H4NO2
|
RTECS
TG0175000
|
Synonyms & Trade Names
Azophos®; O,O-Dimethyl-O-p-nitrophenylphosphorothioate; Parathion methyl
|
DOT ID & Guide
2783 / 152 (solid)
3018 / 152 (liquid)
|
Exposure
Limits
|
NIOSH REL: TWA 0.2 mg/m3 [skin]
|
|
OSHA PEL†: none
|
IDLH
N.D.
See: IDLH INDEX
|
Conversion
|
Physical Description
White to tan, crystalline solid or powder with a pungent, garlic-like odor. [pesticide] [Note: The commercial product in xylene is a tan liquid.]
|
MW: 263.2
|
BP: 289°F
|
MLT: 99°F
|
Sol(77°F): 0.006%
|
VP: 0.00001 mmHg
|
IP: ?
|
|
Sp.Gr: 1.36
|
Fl.P: ?
|
UEL: ?
|
LEL: ?
|
|
|
Combustible Solid
|
Incompatibilities & Reactivities
Strong oxidizers, water [Note: Explosive risk when heated above 122°F.]
|
Measurement Methods
NIOSH 5600; OSHA PV2112
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated/Daily
Remove: When wet or contaminated
Change: Daily
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
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
Up to 200 mg/m3:
(APF = 2000) Any supplied-air respirator that has a full facepiece and is 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
|
Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
|
Symptoms
Irritation eyes, skin; nausea, vomiting, abdominal cramps, diarrhea, salivation; headache, dizziness, lassitude (weakness, exhaustion); rhinorrhea (discharge of thin mucus), chest tightness; blurred vision, miosis; cardiac irregularities; muscle fasciculation; dyspnea (breathing difficulty)
|
Target Organs
Eyes, skin, respiratory system, central nervous system, cardiovascular system, blood cholinesterase
|
|
See also: INTRODUCTION
See ICSC CARD: 0626 |
