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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]
MW:
255.5
BP:
Decomposes		 MLT: 307°F Sol(77°F): 0.03%
VP:
1 x 10-7 mmHg
IP:
?
Sp.Gr:
1.80
Fl.P:
?
UEL:
?
LEL:
?
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   See ICSC CARD: 0075   See MEDICAL TESTS: 0249
 

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