| Chemical |
Mesityl oxide |
| CAS-number : |
141-79-7 |
| |
| Synonyms : |
| 2-methyl-2-penten-4-one. |
| 3-Penten-2-one, 4-methyl- |
| 4-methyl-3-pentene-2-one |
| isobutenyl methyl ketone |
| isopropylideneacetone |
| Mesityylioksidi |
| methyl isobutenyl ketone |
| |
| Sumformula of the chemical : |
| C6H10O |
| EINECS-number : |
| 2055025 |
| |
| Odor : |
Quality: sweet
Hedonic tone: pleasant
Threshold odour concentration
absolute: 0.017 ppm
50 % recognition: 0.051 ppm
100 % recognition: 0.051 ppm
Odour index 100 % recognition: 210 000
(Hellman & Small 1974)
|
| |
| Molecular weight : |
98.16 |
| |
| Water solubility, mg/l : |
| 28000 |
28000 (20°C), MITI 1992 |
| |
| Melting point, °C : |
| -59 |
MITI 1992 |
| |
| Boiling point, °C : |
| 129.5 |
760 mmHg, MITI 1992 |
| |
| Chemical oxygen demand, g O2/g : |
| 2.4 |
5 days, Bridie et al. 1979 |
| |
| Biochemical oxygen demand, g O2/g : |
| 1.91 |
5 days, Bridie et al. 1979 |
| |
| Total degradation in water : |
Biodegradaation:
77.2% by BOD
period: 14d
substance: 100 mg/l
sludge: 30 mg/l
(MITI 1992)
|
| |
| Ready biodegradability : |
Confirmed to be biodegradable (Anon. 1987). |
| |
| LD50 values to mammals in oral exposure, mg/kg : |
| 710 |
orl-mus, Sweet 1987 |
| 1120 |
orl-rat |
| |
| LD50 values to mammals in non-oral exposure , mg/kg : |
| 354 |
ipr-mus, Sweet 1987 |
| 5150 |
skn-rbt |
| |
| LC50 values to mammals in inhalation exposure, mg/m3 : |
| 10000 |
ihl-mus, 2hr, Sweet 1987 |
| 9000 |
ihl-rat, 4hr |
| |
| LDLo values to mammals in non-oral exposure , mg/kg : |
| 840 |
scu-rbt, Sweet 1987 |
| |
| TCLo values to mammals in inhalation exposure, ppm : |
| 25 |
ihl-hmn, Sweet 1987 |
| |
| Other information of mammals : |
Skin and eye irritation data:
eye, human, 25 ppm, 15 min;
skin, rabbit, 430 mg open, mild;
eye, rabbit 4.325 mg, severe (Sweet 1987).
|
| |
| Effects on amphibia : |
LDLo, 1400 mg/kg, scu-frog (Sweet 1987).
|
| |
| LC50 values to fishes, mg/l : |
| 540 |
24hr, Carassius auratus |
| |
Bridie et al. 1979 |
References |
| 1848 | Anon. 1987a.
The list of the existing chemical substances tested
on biodegradability by microorganisms or bioaccumulation in
fish body by Chemicals Inspection & Testing Institute.
Ministry
of International Trade and Industry, MITI.
Japan. |
| 182 | Bridie, A.L. et al. 1979.
The acute toxicity of some
petrochemicals to goldfish.
Water Res. 13: 623. |
| 1680 | Bridie, A.L., Wolff, C.J.M. & Winter, M. 1979.
BOD and COD of
some petrochemicals.
Water Res. 13: 627 - 630. |
| 1673 | Hellman, T.M. & Small, F.H. 1974.
Characterization of the odour
properties of 101 petrochemicals using sensory methods.
J.
Air
Pollut.
Control Assoc. 24: 979 - 982. |
| 3105 | MITI 1992.
Biodegradation and bioaccumulation data of existing
chemicals based on the CSCL Japan.
Compild under the Safety
Division Basic Industries Bureau Ministry of International
Trade & Industry, Japan.
Edited by Chemicals Inspection &
Testing Institute, Japan.
|
| 2101 | Sweet, D. 1987.
Registry of toxic effects of chemical
substances 1985 - 1986 edition.
U.S.
Department of health and
human services. |
