|Chemical Abstract Number (CAS #)||
|Synonyms||cis-1,3-Dichloropropene||1-Propene, 1,3-dichloro-, (Z)-
||EPA Method 502.2||EPA Method 524.2
||EPA Method 601
||EPA Method 624
||EPA Method 8010
||EPA Method 8021
||EPA Method 8260
Link to the National Library of Medicine's Hazardous Substances
Database for more details
on this compound.
|Use|| USED PRIMARILY IN SOIL FUMIGANTS OR AS COMPONENT OF SOIL
FUMIGANT MIXTURES; SMALL AMT AS CHEM INTERMEDIATE.
Used as an insecticide and fumigant.
|Apparent Color|| COLORLESS LIQUID
|Odor|| CHLOROFORM-LIKE ODOR; Sharp, sweet, penetrating irritating odor
|Boiling Point|| 104.3 DEG C
|Molecular Weight|| 110.97
|Density|| 1.217 AT 20 DEG C/4 DEG C
|Sensitivity Data|| EYE, SKIN & RESP TRACT IRRITANT. 1,3-DICHLOROPROPENE (CIS AND
|Environmental Impact|| cis-1,3-Dichloropropane is released into the air and in wastewater during its production
and use as a soil fumigant and chemical intermediate. When injected into the soil, volatilization of
cis-1,3-dichloropropene occurs from the soil surface which decreases to insignificant levels after
approximately 4 weeks. Low temperatures and heavy rains will lengthen the volatilization period.
In spill situations, cis-1,3-dichloropropene will volatilize much faster. It may also leach into
groundwater. Most of the cis-1,3-dichloropropene will hydrolyze (half-life 9 to > 69 days) to
cis-3-chloroallyl alcohol. In one experiment 12% of the radioactivity from (14)carbon
-cis-1,3-dichloropropene remained in soil after 10 days and < 20% of that was unchanged parent.
This indicates that most cis-1,3-dichloropropene is degraded rather than lost by volatilization. The
overall half-life of cis-1,3-dichloropropene in soil may range from a few days to more than 9
weeks depending upon conditions. Rapid soil disappearance will be associated with moist soil
content that promotes hydrolysis and porous soil that promotes volatilization. If released into
water, it will be lost primarily through volatilization (half-life from a model river about 4 hours).
Adsorption to sediment and bioconcentration in fish are not expected to be important processes.
In the atmosphere, this compound will degrade primarily by reaction with photochemically
produced hydroxyl radicals (half-life 50 hr) or scavenged by rain. Some dispersion away from
source or target areas would be expected. Humans are primarily exposed to this compound
occupationally, by inhalation near source areas, and by ingestion of contaminated drinking water.
|Environmental Fate|| TERRESTRIAL FATE: AT 15-20 DEG C IN SANDY SOILS,
1,3-DICHLOROPROPENES EXHIBITED AN AVG HALF-LIFE OF 24 DAYS &
DISAPPEARED AT RATE OF 2 TO 3.5%/DAY WITH NO MARKED ISOMER
DIFFERENCE. CHLORIDE WAS RELEASED BUT SLOWED TO ABOUT 3% AFTER
INITIAL RAPID RELEASE. THE CIS-ISOMER (T1/2= ABOUT 2 DAYS)
TERRESTRIAL FATE: CIS-1,3-DICHLOROPROPENE IS CONVERTED IN WET SOIL
TO THE CORRESPONDING ALLYL ALCOHOL.
TERRESTRIAL FATE: cis-1,3-Dichloropropene is mobile in soil; its movement is a function of
temperature, soil type and moisture(1,3). It will bind to the soil, degrade, leach or be vented into
the atmosphere. It is estimated that 5-10% of cis-1,3-dichloropropene is lost to the atmosphere
after a commercial application as a fumigant to a warm, moist sandy soil at a depth of 0.3 m . In
soils simulating the structure and moisture conditions that may occur in a field during fumigation,
of <1% of the cis-1,3-dichloropropene is in the soil vapor phase, 10-20% is in the water phase,
and 80-90% is adsorbed . An increase in temperature, increases the Henry's Law constant and
increases the diffusion of cis-1,3-dichloropropene through soil and shortens the volatilization
time . Generally, when the temperature decreases from 25 to 5 deg C, there will be a threefold
increase in its ratio in the water phase as in air .
TERRESTRIAL FATE: Adsorption is higher in dry soils than in moist soil . However,
water-saturated soils have air passageways blocked and fumigant movement is decreased . This
is illustrated by a 20-day study in which the 1,3-dichloropropene diffused to <.46 m in a silty clay
loam with 23% moisture (dry wt) and >1.20 m in the same soil when the moisture content was