| Chemical |
Peracetic acid |
| CAS-number : |
79-21-0 |
| |
| Synonyms : |
| Ethaneperoxoid acid |
| PAA |
| peroxyacetic acid |
| |
| Sumformula of the chemical : |
| C2H4O3
|
| EINECS-number : |
| 2011868 |
| |
| Purity, % : |
| 5 |
5-15 |
| 15 |
WPSREG 1994 |
| |
| Known impurities : |
water
acetic acid (CH3COOH)
hydrogenperoxide (H2O2)
dinatriumpyrophosphate
ammoniumnitrate
(WPSREG 1994). |
| |
| Uses : |
Active substance in slimicides: to prevent slime and clogging
caused by harmful micro-organisms in cooling and circulating
water systems and paper production (WPSREG 1994).
|
| |
| State and appearance : |
Colorless liquid (WPSREG 1994).
|
| |
| Molecular weight : |
76.05 |
| |
| Density, kg/m3 : |
| 1200 |
WPSREG 1994 |
| |
| Vapor pressure, mmHg : |
| 0.00825 |
0.0085 - 0.009 |
| 0.009 |
WPSREG 1994 |
| |
| Melting point, °C : |
| 0.1 |
WPSREG 1994 |
| |
| Boiling point, °C : |
| 103 |
WPSREG 1994 |
| |
| Flashing point, °C : |
| 100 |
>100, for concentrated solution 40.6 °C, WPSREG 1994 |
| |
| pKa : |
| 8.2 |
|
| |
| Log octanol/water coefficient, log Pow : |
| -0.924 |
calculated, WPSREG 1994 |
| |
| Henry's law constant, Pa x m3/mol : |
| 0.21 |
at 25 °C, experimental, WPSREG 1994 |
| |
| Other physicochemical properties : |
Completely watersoluble.
Soluble in alcohol and in ether, com-
pletely soluble in polar solvents, poorly in aromatic solvents.
Oxidizing (as over 12 % solution), corrosive (WPSREG 1994).
|
| |
| Photochemical degradation in air : |
Photooxidation half-life in air:
13.8hr - 138hr,
based upon estimated reaction rate constant with .OH.
(Howard 1991).
|
| |
| Photochemical degradation in water : |
Photooxidation half-life in water:
4hr - 198hr,
scientific judgement based upon reported reaction of the
hydroperoxide class with RO2x in natural water (Howard 1991).
|
| |
| Hydrolysis in water : |
Hydrolysis: T1/2 (20°C) about 1 week in pH 4.4 and 1 d in pH 7;
< 0.02 % PAA-solution T1/2 = about 24 hr (pH not known),
(WPSREG 1994).
|
| |
| Hydrolysis in acid : |
Hydrolysis: 0.2 % solution in pH 2.7 nearly stabile.
(WPSREG 1994).
|
| |
| Half-life in air, days : |
| 0.58 |
13.8hr - 138hr, |
| 5.75 |
based upon estimated photooxidation half-life |
| |
in air, |
| |
Howard 1991 |
| |
| Half-life in soil, days : |
| 0.17 |
4hr - 48hr, |
| 2 |
scientific judgement based upon peracetic acid's |
| |
expected high reactivity with organic matter in soil, |
| |
Howard 1991 |
| |
| Half-life in water, days : |
| 0.17 |
4hr - 168hr, |
| 7 |
in surface water, high value based upon estimated |
| |
high value for aqueous aerobic biodegradation. |
| |
Low value based upon estimated low value for |
| |
aqueous photooxidation, |
| 2 |
48hr - 336hr, |
| 14 |
in groud water, high value based upon estimated |
| |
aqueous aerobic biodegradation half-life. Low |
| |
value is scientific judgement based upon potential |
| |
reactivity with organic material in ground water, |
| |
Howard 1991 |
| |
| Aerobic degradation in water : |
Aerobic half-life:
24hr - 168hr,
scientific judgement based upon rapid aerobic biodegradation of
acetic acid (Howard 1991).
|
| |
| Anaerobic degradation in water : |
Anaerobic half-life:
4d - 28d,
scientific judgement based upon estimated aqueous aerobic
biodegradation half-lives (Howard 1991).
|
| |
| Other information of bioaccumulation : |
Not bioaccumulative, (WPSREG 1994).
|
| |
| LD50 values to mammals in oral exposure, mg/kg : |
| 23 |
23-330, orl rat, calculated, |
| 330 |
WPSREG 1994 |
| |
| Effects on wastewater treatment : |
NOEC for microbs in the active sludge 25-50 mg/l (WPSREG 1994).
|
| |
| EC50 values to algae, mg/l : |
| 0.7 |
>/= 0.7, (absorbance, 96 hr), Anabaena variabilis |
| 1.6 |
>/= 1.6, (absorbance, 96 hr), Synecococcus leopoliensis |
| 12 |
>/= 12, (absorbance, 72 hr), Chlamydomonas eugametos |
| 4 |
>/= 4.0, (absorbance, 96 hr), Scenedesmus quadricauda, |
| |
WPSREG 1994 |
| |
| LOEC values to algae, mg/l : |
| 1.1 |
>/= 1.1, (growth, 96 hr), Anabaena variabilis |
| 2.3 |
>/= 2.3, (growth, 96 hr), Synecococcus leopoliensis |
| 17 |
>/= 17, (growth, 72 hr), Chlamydomonas eugametos |
| 16 |
>/= 16, (growth, 96 hr), Scenedesmus quadricauda, |
| |
WPSREG 1994 |
| |
| EC50 values to crustaceans, mg/l : |
| 108 |
108 - 149, product, 12% PAA, 96 hr, Crangon crangon (sea water), |
| 149 |
|
| 1.75 |
1.75 - 2.55, product, 12% PAA, 48 hr, larvaes of Mytilus edulis (sea water), |
| 2.55 |
|
| 2.1 |
2.10 - 2.40, product, 12% PAA, 48 hr, larvaes of Crassotrea gigas, (sea water), |
| 2.4 |
WPSREG 1994 |
| |
| LC50 values to fishes, mg/l : |
| 10 |
10 - 18, product, 12% PAA, Salmo gairdneri, |
| 18 |
|
| 80 |
80 - 99, product, 12% PAA, Pleuronectes platessa, |
| 99 |
(sea water), WPSREG 1994 |
| |
| Other information : |
LC99.9 = 1-150 mg/l, Escherichia coli
LC99.9 = 6-1000 mg/l, Streptococcus faecalis (influence
depends on the properties of the test solution),
NOEC = 25-50 mg/l, active sludge microbs, (WPSREG 1994).
|
References |
| 3120 | Howard, P.H., Boethling, R.S., Jarvis, W.F., Meylan, W.M. &
Michalenko, E.M., Handbook of Environmental Degradation Rates,
1991.
Lewis Publicers, Inc., Chelsea, Michigan, U.S.A.,
pp. 725.
|
| 3119 | WPSREG.
Application for registration of wood preservatives/
slimicides.
National Board of Waters and the Environment,
Chemicals Control Unit.
|
