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Key Documents

W513504

Sigma-Aldrich

Styrene oxide

≥97%

Synonym(s):

1,2-Epoxyethylbenzene, Phenylethylene oxide, Phenyloxirane

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About This Item

Empirical Formula (Hill Notation):
C8H8O
CAS Number:
Molecular Weight:
120.15
Beilstein/REAXYS Number:
108582
EC Number:
MDL number:
UNSPSC Code:
12164502
PubChem Substance ID:
biological source:
synthetic
food allergen:
no known allergens

biological source

synthetic

vapor density

4.14 (vs air)

vapor pressure

<1 mmHg ( 20 °C)

assay

≥97%

autoignition temp.

928 °F

expl. lim.

~22 %

refractive index

n20/D 1.535 (lit.)

bp

194 °C (lit.)

mp

−37 °C (lit.)

density

1.054 g/mL at 25 °C (lit.)

application(s)

flavors and fragrances

documentation

see Safety & Documentation for available documents

food allergen

no known allergens

SMILES string

C1OC1c2ccccc2

InChI

1S/C8H8O/c1-2-4-7(5-3-1)8-6-9-8/h1-5,8H,6H2

InChI key

AWMVMTVKBNGEAK-UHFFFAOYSA-N

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pictograms

Skull and crossbonesHealth hazard

signalword

Danger

Hazard Classifications

Acute Tox. 3 Inhalation - Acute Tox. 4 Dermal - Carc. 1B - Eye Irrit. 2 - Muta. 1B - Skin Irrit. 2 - Skin Sens. 1

Storage Class

6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

wgk_germany

WGK 3

flash_point_f

176.0 °F - closed cup

flash_point_c

80 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter


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The genetic toxicology of styrene and styrene oxide.
R Barale
Mutation research, 257(2), 107-126 (1991-03-01)
E E McConnell et al.
Critical reviews in toxicology, 24 Suppl, S49-S55 (1994-01-01)
Eleven long-term toxicity studies were reviewed on styrene and five on styrene oxide in an effort to evaluate the potential carcinogenic activity of these chemicals in animals. The styrene studies included inhalation exposure (rats, mice, guinea pigs, and rabbits), intragastric
Jan Volmer et al.
Applied and environmental microbiology, 80(20), 6539-6548 (2014-08-17)
The application of whole cells as biocatalysts is often limited by the toxicity of organic solvents, which constitute interesting substrates/products or can be used as a second phase for in situ product removal and as tools to control multistep biocatalysis.
D H Phillips et al.
Critical reviews in toxicology, 24 Suppl, S35-S46 (1994-01-01)
Styrene is metabolized to styrene oxide, a direct-acting mutagen and carcinogen. Styrene oxide reacts with DNA mainly at the N-7 position in guanine, but also at other sites and with other bases. Substitution occurs at both the alpha- and beta-positions
Shuangjun Lin et al.
Organic letters, 12(17), 3816-3819 (2010-08-14)
Neocarzinostatin (1) biosynthesis is proposed to involve a vicinal diol intermediate. It is reported that NcsF2, one of two epoxide hydrolases encoded by the NCS gene cluster, catalyzes regiospecific addition of H(2)O to C-2 of both (R)- and (S)-styrene oxides

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