| Chemical |
Citric acid |
| CAS-number : |
77-92-9 |
| |
| Synonyms : |
| 2-hydroksi-1,2,3-propaanitrikarboksyylihappo |
| 2-hydroxy-1,2,3-propanetricarboxylic acid |
| beta-hydroxytricarballylic acid |
| Sitruunahappo |
| |
| Sumformula of the chemical : |
| C6H8O7 |
| EINECS-number : |
| 2010691 |
| |
| Molecular weight : |
192.12 |
| |
| Spesicif gravity (water=1) : |
| 1.542 |
at 18/4 °C |
| |
| Water solubility, mg/l : |
| 1330 |
cold |
| |
| Melting point, °C : |
| 153 |
|
| |
| Log octanol/water coefficient, log Pow : |
| -1.72 |
Verschueren 1983 |
| |
| Other physicochemical properties : |
Decomposes.
|
| |
| Effects on microorganisms : |
Toxicity threshold (cell multiplication inhibition test):
Pseudodomonas putida >10 000 mg/l.
(Bringmann & Kühn 1980)
|
| |
| LOEC values to algae, mg/l : |
| 80 |
rpd, schr, Microcystis aeruginosa |
| |
Bringmann & Kühn 1976 |
| |
| Other information of water organisms : |
LC100, 120 mg/l, act, Daphnia magna (Ellis 1937).
Toxicity threshold (cell multiplication inhibition test):
Microcystis aeruginosa 80 mg/l (Bringmann & Kühn 1976)
Scenedesmus quadricauda 640 mg/l (Bringmann & Kühn 1980a)
Entosiphon sulcatum 485 mg/l (Bringmann & Kühn 1980a)
Uronema parduczi Chatton- 622 mg/l (Bringmann & Kühn 1980b)
Lwoff
LD0, 80 mg/l, Daphnia magna, long time exposure in solf water.
LD100, 120 mg/l, Daphnia magna, long time exposure in soft
water.
(Verschueren 1983)
Carassius auratus: period of survival:
4-48 hr: 894 ppm at pH 4.0
days: 625 ppm at pH 4.5 (Verschueren 1983)
LD0, 625 mg/l, Carassius auratus, long time exposure in hard
water.
LD100, 894 mg/l, Carassius auratus, long time exposure in hard
water.
(Verschueren 1983)
|
References |
| 187 | Bringmann, G. & Kühn, R. 1976.
Vergleichende Befunde der
Schadwirkung wassergefährdender Stoffe gegen Bakterien
(Pseudomonas putida) und Blaualgen (Microcystis aeruginosa).
Gwf-Wasser-Abwasser 117(9). |
| 188 | Bringmann, G. & Kühn, R. 1980a.
Comparison of the toxicity
thresholds of water pollutants to bacteria, algae and
protozoa in the cell multiplication inhibition test.
Water
Res. 14: 231 - 241. |
| 189 | Bringmann, G. & Kühn, R. 1980b.
Bestimmung der biologischen
Schadwirkung wassergefahrdender Stoffe gegen Protozoen.
II.
Bakterienfressende Ciliaten, Z.
Wasser/Abwasser Forsch. 1: 26 -
31. |
| 400 | Ellis, M.M. 1937.
Detection and measurement of stream
pollution, U.S.
Bur.
Fisheries Bull.
No 22, XLVIII: 365 - 437.
U.S.
Dept.
Commerce, Washington. |
| 704 | Kemp, H.T., Little, R.L., Holoman, V.L. & Darby, R.L.
1973.
Water quality data book - Vol. 5.
Effects of
chemicals on aquatic life.
EPA.
Water pollution control
research series 09/73. |
| 1468 | Verschueren, K. 1983.
Handbook of environmental data of
organic chemicals.
Van Nostrand Reinhold Co.
Inc., New York.
1310 s. |
