| Chemical Abstract Number (CAS #) |
76039
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| Synonyms | Trichloroacetic acid |
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Acetic acid, trichloro- | TCA |
| Analytical Method |
EPA Method 552.1 |
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| Molecular Formula | C2HCl3O2 |
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| Use | DECALCIFIER AND FIXATIVE IN MICROSCOPY, PRECIPITANT OF PROTEIN
CAUTERIZING AGENT USED TO DISSOLVE KERATIN, FOR APHTHOUS
STOMATITIS
CHEM INT FOR ETHYLENE GLYCOL BIS(TRICHLOROACETATE) & HERBICIDES,
SODIUM TRICHLOROACETATE & MONURON-TCA; LAB REAGENT FOR
BIOLOGICAL APPLICATIONS
ORGANIC SYNTHESIS; REAGENT FOR DETECTION OF ALBUMIN; HERBICIDES
MEDICATION: TCA HAS BEEN USED AS AN ASTRINGENT AND ANTISEPTIC
TCA is a before emergence herbicide acting via the soil. It is used against: couch grass (at 15-30
kg active equivalent/ha wild oats (at 7.8 kg/ha) prior to planting kale, peas or sugar beet.
Organic synthesis, medicine, pharmacy, herbicides
TCA is an effective soil sterilant used for perennial weed grass control on noncropland and
stubble. Used selectively to control seedling grasses and some broadleaf weeds in sugar beets,
sugarcane, and oilseed rape. TCA acts principally through the soil and application to the soil, but
also causes foliar response at nonselective rates. TCA will inhibit seed germination and plant
growth for 60 days or longer.
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| Apparent Color | CRYSTALS; COLORLESS; WHITE SOLID
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| Odor | SLIGHT CHARACTERISTIC ODOR; SHARP, PUNGENT
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| Boiling Point | 197.55 DEG C @ 760 MM HG; 141-142 DEG C AT 25 MM HG
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| Melting Point | 58 (ALPHA) & 49.6 (BETA) DEG C
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| Molecular Weight | 163.40
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| Density | 1.62 @ 25 DEG C/4 DEG C
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| Sensitivity Data | DUST IS VERY IRRITATING TO NOSE & THROAT .
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| Environmental Fate | PERSISTENCE IN THE SOIL IS VARIABLE, 14 DAYS TO ABOUT 90 DAYS,
DEPENDENT ON SOIL TYPE, MOISTURE AND TEMP.
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| Drinking Water Impact | REPORTED THAT NEGLIGIBLE CONCN OF TCA WOULD REMAIN IN
WATER AFTER THE WATER TRAVELED A DISTANCE OF 32.2-40.2 KM, BUT THAT
THE LOW CONCN LIKELY WOULD NOT BE HAZARDOUS TO CROPS OR ANIMALS.
MAX CONCN OF TCA WERE DETECTED WITHIN THE FIRST HR OF WATER FLOW, &
NO TCA WAS DETECTED AFTER 48 HR @ 14.5 KM BELOW THE TREATMENT SITE
.
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