| Chemical |
n-butyric acid |
| CAS-number : |
107-92-6 |
| |
| Synonyms : |
| butaanihappo |
| butyyrihappo |
| ethylacetic acid |
| etyylietikkahappo |
| n-butanoic acid |
| n-butyyrihappo |
| |
| Sumformula of the chemical : |
| CH3(CH2)2COOH
C4H8O2 |
| EINECS-number : |
| 2035323 |
| |
| State and appearance : |
Colourless liquid.
|
| |
| Odor : |
Sour.
|
| |
| Molecular weight : |
88.1 |
| |
| Spesicif gravity (water=1) : |
| 0.959 |
at 20/4 °C |
| |
| Vapor density (air=1) : |
| 3.04 |
|
| |
| Conversion factor, 1 ppm in air=_mg/m3 : |
| 3.66 |
mg/m3 |
| |
| Conversion factor, 1 mg/m3 in air=_ppm : |
| 0.27 |
ppm |
| |
| Vapor pressure, mmHg : |
| 0.43 |
at 20 °C |
| 1.4 |
at 30 °C |
| |
| Water solubility, mg/l : |
| 56200 |
at - 1.1 °C |
| |
| Melting point, °C : |
| -5.5 |
- 5.5/- 8 °C |
| -8 |
|
| |
| Boiling point, °C : |
| 163.7 |
at 757 mm |
| |
| pKa : |
| 4.82 |
|
| |
| Log octanol/water coefficient, log Pow : |
| 0.79 |
Sangster 1989 |
| |
| LD50 values to mammals in oral exposure, mg/kg : |
| 2900 |
2900 - 3800, orl-rat, Patty 1967 |
| 3800 |
|
| |
| Effects on microorganisms : |
Toxicity threshold (cell multiplication inhibition test):
bacteria (Pseudomonas putida): 875 mg/l
(Bringmann & Kühn 1980).
|
| |
| LOEC values to algae, mg/l : |
| 318 |
rpd, schr, Microcystis aeruginosa |
| |
Bringmann & Kühn 1976 |
| |
| LC50 values to crustaceans, mg/l : |
| 61 |
48hr, Daphnia magna |
| |
Dowden & Bennett 1965 |
| |
| Other information of water organisms : |
Toxicity threshold (cell multiplication inhibition test):
algae (Microcystis aeruginosa): 318 mg/l
(Bringmann & Kühn 1976)
green algae (Scenedesmus quadricauda): 2600 mg/l
protozoa (Entosiphon sulcatum): 26 mg/l
protozoa (Uronema parduczi): 129 mg/l
(Bringmann & Kühn 1980).
Algae: Chlorella pyrenoidosa: toxic: 340 mg/l (Jones 1971).
Scenedesmus: toxic: 200 mg/l (Meinck et al. 1970).
Protozoa:
Vorticella campanula: toxic: 10 mg/l (Meinck et al. 1970)
Paramaecium caudatum: toxic: 250 mg/l
Arthropoda: Daphnia: toxic: 60 mg/l (Meinck et al. 1970)
Mollusca: Limnea ovata: toxic: 50 mg/l
|
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. |
| 355 | Dowden, B.F. & Bennett, H.J. 1965.
J.
Wat.
Poll.
Contr.
Fed. 37(9): 1310. |
| 675 | Jones, H.R. 1971.
Environmental control in the organic and
petrochemical industries.
Noyes Data Corporation 1971. |
| 950 | Meinck, F., Stoof, H. & Kohlschutter, H. 1970.
Les eaux
residuaires industrielles. |
| 1644 | Patty, F.A. 1967.
Industrial hygiene and toxicology.
Vol 2.
Interscience Publishers. |
| 3104 | Sangster, J. 1989.
Octanol-water partition coefficients of
simple organic compounds.
J.
Phys.
Chem.
Ref.
Data, Vol 18, No.
3: 1111 - 1229. |
| 1468 | Verschueren, K. 1983.
Handbook of environmental data of
organic chemicals.
Van Nostrand Reinhold Co.
Inc., New York.
1310 s. |
