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sulfur trioxide

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Origin: China

Cas No: 7446-11-9

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 50 mt/month

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CAS No.: 7446-11-9 Formula: O3S Molecular Weight: 80.06320

Description

Sulfur trioxide (alternative spelling sulphur trioxide) is the chemical compound with the formula SO3. In the gaseous form, this species is a significant pollutant, being the primary agent in acid rain. It is prepared on an industrial scale as a precursor to sulfuric acid.

Basic Info

Chemical Name	sulfur trioxide
Synonyms	Schwefeltrioxid; sulfuric acid anhydride; SO3; SULPHUR TRIOXIDE; Sulfur trioxide; Sulfan; Sulfur oxide (SO3); SULFURIC ANHYDRIDE; Sulfuric oxide; SULFAN(R); sulfur(VI) oxide;
CAS No.	7446-11-9
Molecular Formula	O3S
Molecular Weight	80.06320
PSA	83.30000
LogP	0.29180

Properties

Appearance & Physical State	Needles or polymer
Density	1.92
Boiling Point	44.8ºC
Melting Point	16.8ºC
Water Solubility	reacts violently
Stability	Stable. Incompatible with organic materials, finely powdered metals, bases, water, cyanides and a wide variety of other chemicals. Reacts violently with water, oxygen and other chemicals - read a full data sheet before use.
Storage Condition	Indoors
Vapor Density	2.8 (vs air)
Vapor Pressure	280 mm Hg ( 25 °C)

Safety Info

RTECS	WT4830000
Hazard Class	8
Safety Statements	S25-S36/37/39-S45-S8
WGK Germany	1
Packing Group	I
RIDADR	UN 1829 8
Risk Statements	R14; R34
Hazard Codes	C
Supplemental Hazard Statements	Reacts violently with water.
Caution Statement	P261; P280; P305 + P351 + P338; P310
Hazard Declaration	H314; H335
Symbol	GHS05, GHS07
Signal Word	Danger

Synthesis Route

[NMe4][XeO(fluoride)3]+sulfur dioxide→XENON DIFLUORIDE+sulfur trioxide
PYROSULFURYL CHLORIDE+hydrogen bromide→hydrogen chloride+Sulfuric acid
Bromine(I) trifluoromethanesulfonate→trifluoromethanesulfonic (trifluoromethyl sulfuric) anhydride+BROMOTRIFLUOROMETHANE

Precursor

sulfur dioxide
Sulfur
oxygen
carbon monoxide

Downstream Product

methoxysulfonyl methyl sulfate
4,4'-sulfonyldiphenol
2,3,5-trimethylphenol
Stannane, dichlorobis[(chlorosulfonyl)oxy]-

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