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. |