General
Synonyms: amsco H-J, Amsco H-SB, Benzin B70, benzoline, hi-flash naphtha,
hydrotreated naphtha, rubber solvent, super vmp,
pet ether, ligroine, petroleum spirits, petroleum
naptha, benzin, petroleum benzine, petroleum spirit x-y C (in which x-y denotes
the range over which the material boils)
Molecular formula: varies. Typically samples contain
predominantly
n-pentane and
hexane, with small amounts of
methylpentane,
cyclopentane, dimethylbutane and other short chain hydrocarbons.
CAS No: 8032-32-4
EC No: 232-453-7
EU number: 649-263-00-9
Physical data
Appearance: colourless liquid with hydrocarbon odour
Melting point: varies with formulation, typically near -70 C
Boiling point: varies with formulation, typically ca. 35 - 60 C
Specific gravity: varies with formulation, typically ca. 0.64
Vapour pressure:
Flash point: typically ca. -46 C
Explosion limits: typically ca. 1% - 8%
Autoignition temperature: ca. 245 C
Water solubility: negligible
Stability
Stable. Extremely flammable. Avoid strong oxidizing agents,
all sources of ignition. As a consequence of its low flashpoint,
mixtures of this material with air may ignite upon contact
with hot surfaces - a naked flame is not required.
Toxicology
Since the formulation of this product varies from one supplier to another,
the hazards associated with the liquid cannot be defined exactly without a
knowledge of the composition. Some formulations are believed to act largely as irritants, but
may present little further hazard; others may contain components that could
be carcinogenic in humans. Treat as harmful by inhalation, ingestion or by
skin contact. If the composition is unknown, assume that the product is toxic if inhaled.
Inhalation may cause headache,
nausea or vomitting. Prolonged or repeated skin contact
may cause dermatitis. Typical TLV 1350 mg/m3 (300 ppm)
Toxicity data
(The meaning of any abbreviations which appear in this section
is given
here.)
IHL-HMN LCLO 3pph/5m
IVN-MAN LDLO 27000 mg kg-1
ORL-RAT LD50 > 5000 mg kg-1
SKN-RBT LD50 > 3000 mg kg-1
Risk phrases
(The meaning of any risk phrases which appear in this section is
given here.)
R11 R20 R21 R22 R45 R65.
Transport information
(The meaning of any UN hazard codes which appear in this section
is given here.)
UN No 1268. Hazard class 3.0 Transport category 2. Packing group II.
Personal protection
Safety glasses. Use efficient ventilation. Remove all sources
of ignition, including hot plates, from the working area.
Safety phrases
(The meaning of any safety phrases which appear in this section
is given here.)
S45 S53.
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Theoretical Chemistry Lab. Safety home page.]
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