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sulfur dioxide

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Origin: China

Cas No: 7446-09-5

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 50 mt/month

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CAS No.: 7446-09-5 Formula: O2S Molecular Weight: 64.06380

Description

Sulfur dioxide (also sulphur dioxide) is the chemical compound with the formula SO 2. At standard atmosphere, it is a toxic gas with a pungent, irritating smell. The triple point is 197.69 K and 1.67 kPa. It is released naturally by volcanic activity.
Sulfur dioxide was used by the Romans in winemaking when they discovered that burning sulfur candles inside empty wine vessels kept them fresh and free from vinegar smell.

Basic Info

Chemical Name	sulfur dioxide
Synonyms	sulfuroxide; Schwefeldioxyd; Schwefeldioxid; SulfureDioxide; sulfurousoxide; SO2; dioxidedesoufre; SULPHUR DIOXIDE; Sulfur dioxide;
CAS No.	7446-09-5
Molecular Formula	O2S
Molecular Weight	64.06380
PSA	66.23000
LogP	0.41060

Properties

Appearance & Physical State	white to yellow solid
Density	1.25 g/mL at 25ºC(lit.)
Boiling Point	-10ºC
Melting Point	-73ºC
Refractive Index	1.3047 (20ºC)
Stability	Stable. Non-corrosive when dry to common materials except zinc; corrosive when wet. Incompatible with strong reducing or oxidizing agents, moisture, zinc and its alloys.
Storage Condition	Protect against physical damage, store outdoors or in a well ventilated area of noncombustible construction.
Vapor Density	2.26 (21 °C, vs air)
Vapor Pressure	1779 mm Hg ( 21 °C)

Safety Info

RTECS	WS4550000
Hazard Class	2.3
Safety Statements	S9-S26-S36/37/39-S45
HS Code	2811290090
WGK Germany	1
RIDADR	UN 1079
Risk Statements	R23; R34
Hazard Codes	T
Signal Word	Danger
Caution Statement	P261; P280; P305 + P351 + P338; P310; P410 + P403
Hazard Declaration	H280; H314; H331
Symbol	GHS05, GHS06

Synthesis Route

chlorosulfonyldifluoroacetylchloride→Chlorodifluoroacetyl chloride+sulfur dioxide
perfluoropropanesulfonic acid→+CARBONYL FLUORIDE
sulfuryl bromide fluoride→+sulfur dioxide

Downstream Product

Phosphorus oxybromide
hypobromous dithioperoxyanhydride
Thionyl bromide
dibromine

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