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2,4,5-T

Synonyms & Trade Names
2,4,5-Trichlorophenoxyacetic acid
CAS No.
93-76-5
RTECS No.
AJ8400000
DOT ID & Guide
2765 152
Formula
Cl₃C₆H₂OCH₂COOH
Conversion
IDLH
250 mg/m3
See: 93765
Exposure Limits
NIOSH REL
TWA 10 mg/m3
OSHA PEL
TWA 10 mg/m3
Measurement Methods
NIOSH 5001
See: NMAM or OSHA Methods
Physical Description
Colorless to tan, odorless, crystalline solid. [herbicide]
Molecular Weight
255.5
Boiling Point
Decomposes
Melting Point
307°F
Solubility
(77°F): 0.03%
Vapor Pressure
1 x 10-7 mmHg
Ionization Potential
?
Specific Gravity
1.80
Flash Point
?
Upper Exposive Limit
?
Lower Explosive Limit
?
Combustible Solid, but burns with difficulty.
Incompatibilities & Reactivities
None reported
Exposure Routes
inhalation, ingestion, skin and/or eye contact
Symptoms
In Animals: ataxia; skin irritation, acne-like rash; liver damage
Target Organs
Skin, liver, gastrointestinal tract
Personal Protection/Sanitation
(See protection codes)
Skin:No recommendation
Eyes:No recommendation
Wash skin:No recommendation
Remove:No recommendation
Change:No recommendation
First Aid
(See procedures)
Eye:Irrigate immediately
Skin:Soap wash
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations

NIOSH/OSHA

Up to 50 mg/m3:
(APF = 5) Any quarter-mask respirator.
Click here for information on selection of N, R, or P filters.

Up to 100 mg/m3:
(APF = 10) Any particulate respirator equipped with an N95, R95, or P95 filter (including N95, R95, and P95 filtering facepieces) except quarter-mask respirators. 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 250 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 50) Any air-purifying, full-facepiece respirator with 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 a high-efficiency particulate filter.
(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 with 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

See also
INTRODUCTION   ICSC CARD: 0075   MEDICAL TESTS: 0249

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