CAS No.7782-99-2,Sulfurous acid Suppliers,MSDS download

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Basic Information

Molecular Structure:
CAS No.:	7782-99-2
Name:	Sulfurous acid
Article Data:	208

Formula:	H₂O₃S
Molecular Weight:	82.0801
Synonyms:	Schweflige saure;Schweflige saure [German];Sulfur dioxide solution;UNII-J1P7893F4J;
EINECS:	231-973-1
Density:	2.483 g/cm³
Solubility:	soluble in water
Appearance:	clear, colorless liquid
Hazard Symbols:	C
Risk Codes:	20-34
Safety:	26-36/37/39-45
Transport Information:	UN 1833 8/PG 2
PSA:	76.74000
LogP:	0.54680

Synthetic route

: 149-44-0
rongalite

A: 36069-03-1
trithioformaldehyde

B: 7446-09-5
sulfur dioxide

C: 14808-79-8
Sulfate

D: 7782-99-2
sulphurous acid

E: 7704-34-9
sulfur

Conditions

Conditions	Yield
With hydrogenchloride In not given byproducts: H2O, polythionic acids; digesting with HCl-soln.;	A n/a B 82% C 0% D n/a E 82%
With HCl In not given byproducts: H2O, polythionic acids; digesting with HCl-soln.;	A n/a B 82% C 0% D n/a E 82%

...Expand

: 7,11b-dihydro-benzo[c]carbazole-1,6a-disulfonic acid

acid: acid

A: 205-25-4
benzo[c]carbazole

B: 7782-99-2
sulphurous acid

...Expand

: 7647-01-0
hydrogenchloride

: 1,2-bis-[6]quinolylamino-ethane-1,2-disulfonic acid

A: 580-15-4
6-aminoquinoline

B: 131543-46-9
Glyoxal

C: 7782-99-2
sulphurous acid

...Expand

: 7647-01-0
hydrogenchloride

: 7-methoxy-1-methyl-β-carboline-9-sulfonic acid

A: 442-51-3
harmine

B: 7782-99-2
sulphurous acid

...Expand

: 103264-22-8
4-methyl-quinoline-2-sulfonic acid

: 7732-18-5
water

A: 7782-99-2
sulphurous acid

B 2-oxy-4-methyl-quinoline: 2-oxy-4-methyl-quinoline

...Expand

: 2,5-dichloro-indol-3-one

: 7732-18-5
water

sodium sulfite: sodium sulfite

A: 17630-76-1
5-chloroindole 2,3-dione

B: 7782-99-2
sulphurous acid

Conditions

Conditions	Yield
at 90℃; Kochen der erhaltenen Natriumsalz mit Alkalien und folgenden Ansaeuern;

...Expand

: furan-2,3,5(4H)-trione pyridine (1:1)

: 60172-88-5
4,4'-diphenyl-2,4,2',4'-tetrahydro-5,5'-disulfanediyl-bis-[1,2,4]triazol-3-one

A: 7782-99-2
sulphurous acid

B sodium salt of 4-phenyl-3-mercapto-1.2.4-triazolone-(5): sodium salt of 4-phenyl-3-mercapto-1.2.4-triazolone-(5)

...Expand

: 7664-93-9
sulfuric acid

: 102-08-9
N,N-diphenylthiourea

A: 463-79-6
carbonic-acid

B: 7782-99-2
sulphurous acid

C: 121-57-3
4-aminobenzene sulfonic acid

...Expand

: 98-11-3
benzenesulfonic acid

A: 127-63-9
diphenyl sulphone

B: 7664-93-9
sulfuric acid

C: 7782-99-2
sulphurous acid

D: 71-43-2
benzene

Conditions

Conditions	Yield
Destillation unter gewoehnlichem Druck;

...Expand

: 7664-93-9
sulfuric acid

: 57-10-3
1-hexadecylcarboxylic acid

A: 7782-99-2
sulphurous acid

B carbon monoxide: carbon monoxide

Conditions

Conditions	Yield
at 160 - 180℃;

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Specification

The Sulfurous acid, with the CAS registry number 7782-99-2 and EINECS registry number 231-973-1, is also called Dihydrogen sulfite. It is a kind of air sensitive chemical, and belongs to the product category of Inorganics. And the molecular formula of the chemical is H₂O₃S. There is no evidence that sulfurous acid exists in solution, but the molecule has been detected in the gas phase. The conjugate bases of this elusive acid are, however, common anions, bisulfite (or hydrogensulfite) and sulfite. The conjugate bases of this elusive acid are, however, common anions, bisulfite (or hydrogensulfite) and sulfite.

The characteristics of Sulfurous acid are as followings: (1)ACD/LogP: -1.59; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -6.06; (4)ACD/LogD (pH 7.4): -6.09; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1 ; (7)#H bond acceptors: 3; (8)#H bond donors: 2; (9)#Freely Rotating Bonds: 0; (10)Polar Surface Area: 54.74 Å²; (11)Index of Refraction: 1.788; (12)Molar Refractivity: 13.98 cm³; (13)Molar Volume: 33 cm³; (14)olarizability: 5.54×10^-24cm³; (15)Surface Tension: 291.3 dyne/cm; (16)Density: 2.483 g/cm³.

You should be cautious while dealing with this chemical. It is harmful by inhalation, and may cause burns. Therefore, you had better take the following instructions: Wear suitable protective clothing, gloves and eye/face protection, and if in case of contacting with eyes, rinse immediately with plenty of water and seek medical advice, or if in case of accident or if you feel unwell, seek medical advice immediately (show label where possible).

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: O=S(O)O
(2)InChI: InChI=1/H2O3S/c1-4(2)3/h(H2,1,2,3)
(3)InChIKey: LSNNMFCWUKXFEE-UHFFFAOYAJ

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
human	TDLo	oral	500ug/kg (0.5mg/kg)	GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA" GASTROINTESTINAL: NAUSEA OR VOMITING GASTROINTESTINAL: OTHER CHANGES	Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 54, Pg. 421, 1906.