2,4-D
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CAS
94-75-7
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Cl2C6H3OCH2COOH
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RTECS
AG6825000
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Synonyms & Trade Names
Dichlorophenoxyacetic acid; 2,4-Dichlorophenoxyacetic acid
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DOT ID & Guide
2765 / 152
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Exposure
Limits
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NIOSH REL: TWA 10 mg/m3
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OSHA PEL: TWA 10 mg/m3
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IDLH
100 mg/m3
See: 94757
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Conversion
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Physical Description
White to yellow, crystalline, odorless powder. [herbicide]
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MW: 221.0
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BP: Decomposes
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MLT: 280°F
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Sol: 0.05%
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VP(320°F): 0.4 mmHg
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IP: ?
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Sp.Gr: 1.57
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Fl.P: NA
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UEL: NA
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LEL: NA
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Noncombustible Solid, but may be dissolved in flammable liquids.
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Incompatibilities & Reactivities
Strong oxidizers
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Measurement Methods
NIOSH 5001
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH/OSHA
Up to 100 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 = 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 = 25) Any powered air-purifying respirator with an organic vapor cartridge in combination with a high-efficiency particulate filter.
(APF = 10) Any supplied-air respirator
(APF = 50) Any self-contained breathing apparatus 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
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Exposure Routes
inhalation, skin absorption, ingestion, skin and/or eye contact
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Symptoms
Lassitude (weakness, exhaustion), stupor, hyporeflexia, muscle twitching; convulsions; dermatitis; in animals: liver, kidney injury
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Target Organs
Skin, central nervous system, liver, kidneys
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See also: INTRODUCTION
See ICSC CARD: 0033 See MEDICAL TESTS: 0248
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