Sulfurous acid supplier | CasNO.7782-99-2

Name
Sulfurous acid
EINECS 231-973-1
CAS No. 7782-99-2
Article Data208
CAS DataBase
Density 2.483 g/cm³
Solubility soluble in water
Melting Point
Formula H₂O₃S
Boiling Point
Molecular Weight 82.0801
Flash Point
Transport Information UN 1833 8/PG 2
Appearance clear, colorless liquid
Safety 26-36/37/39-45
Risk Codes 20-34
Molecular Structure
Hazard Symbols C
Synonyms Schweflige saure;Schweflige saure [German];Sulfur dioxide solution;UNII-J1P7893F4J;
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℃;

...Expand

: 7664-93-9
sulfuric acid

: 79-31-2
isobutyric Acid

A: 7782-99-2
sulphurous acid

B carbon monoxide: carbon monoxide

Conditions

Conditions	Yield
at 140 - 155℃;

...Expand

: 17356-08-0
thiourea

alkaline alkali hypochlorite: alkaline alkali hypochlorite

A: 7782-99-2
sulphurous acid

B nitrogen: nitrogen

...Expand

: 64-17-5
ethanol

: 1939-99-7
benzenesulfonyl chloride

zinc: zinc

A: 620-32-6
dibenzyl sulfone

B: 4403-73-0
benzylsulfinic acid

C: 7782-99-2
sulphurous acid

D: 100-52-7
benzaldehyde

...Expand

: 646-07-1
4-Methylpentanoic acid

: 7664-93-9
sulfuric acid

: 7782-99-2
sulphurous acid

Conditions

Conditions	Yield
at 170℃;

: 115-24-2
sulfonal

zinc: zinc

hydrogen: hydrogen

: 7782-99-2
sulphurous acid

Conditions

Conditions	Yield
bei der Destillation;

...Expand

: 1-carbamimidoyl-3-carbamoyl-triazane-2-sulfonic acid

diluted natrium carbonate: diluted natrium carbonate

A: N'-carbamimidoyl-triazene-N-carboxylic acid amide

B: 7782-99-2
sulphurous acid

...Expand

: 1-ethoxycarbonyl-3-carbamimidoyl-triazane-2-sulfonic acid

diluted NaOH-solution: diluted NaOH-solution

A: N'-carbamimidoyl-triazene-N-carboxylic acid ethyl ester

B: 7782-99-2
sulphurous acid

...Expand

: 115-08-2
thiocarboxamide

: 7664-93-9
sulfuric acid

A: 7783-06-4
hydrogen sulfide

B: 7782-99-2
sulphurous acid

...Expand

: thionylacetate

: 7732-18-5
water

A: 7782-99-2
sulphurous acid

B: 64-19-7
acetic acid

...Expand

: 40757-83-3
2-hydroxy-2-sulfo-propionic acid

A: 7782-99-2
sulphurous acid

B: 127-17-3
2-oxo-propionic acid

Conditions

Conditions	Yield
Equilibrium constant; wss.-aethanol. Loesung vom pH 3,3 bei 20grad;

: sodium hydrogensulfite

: 127-06-0
acetone oxime

diluted acid: diluted acid

A: 7664-93-9
sulfuric acid

B: 7664-41-7
ammonia

C: 7782-99-2
sulphurous acid

D: 67-64-1
acetone

...Expand

: 1-carbamimidoyl-3-carbamoyl-triazane-2-sulfonic acid

diluted NaOH-solution: diluted NaOH-solution

A: 7782-99-2
sulphurous acid

B nitrogen: nitrogen

...Expand

: 463-56-9
thiocyanic acid

A: 74-90-8
hydrogen cyanide

B: 7664-93-9
sulfuric acid

C: 7782-99-2
sulphurous acid

D sulfur: sulfur

Conditions

Conditions	Yield
Electrolysis;

...Expand

: 100850-89-3
ethyl-amidosulfurous acid

: 7732-18-5
water

A: 7664-93-9
sulfuric acid

B: 7782-99-2
sulphurous acid

C: 75-04-7
ethylamine

D thiosulfuric acid: thiosulfuric acid

Conditions

Conditions	Yield
weitere Produkte: Trithionsaeure, Pentathionsaeure;

...Expand

: 7647-01-0
hydrogenchloride

: 3566-73-2
O,O-dimethyl thiosulfite

A: 7783-06-4
hydrogen sulfide

B: 7782-99-2
sulphurous acid

C sulfur: sulfur

D thiosulfuric acid: thiosulfuric acid

...Expand

: 7647-01-0
hydrogenchloride

: 43035-11-6
2-amino-5-dimethylaminophenylthiosulphonic acid

A: 7664-93-9
sulfuric acid

B: 7782-99-2
sulphurous acid

C 2.2'-diamino-5.5'-bis-dimethylamino-diphenyl sulfide: 2.2'-diamino-5.5'-bis-dimethylamino-diphenyl sulfide

...Expand

: 43035-11-6
2-amino-5-dimethylaminophenylthiosulphonic acid

alkali: alkali

A: 7664-93-9
sulfuric acid

B: 7782-99-2
sulphurous acid

C 2.2'-diamino-5.5'-bis-dimethylamino-diphenyl sulfide: 2.2'-diamino-5.5'-bis-dimethylamino-diphenyl sulfide

...Expand

: 621-08-9
Dibenzyl sulfoxide

A: 150-60-7
dibenzyl disulphide

B: 7782-99-2
sulphurous acid

C: 100-52-7
benzaldehyde

D: 108-88-3
toluene

Conditions

Conditions	Yield
at 210℃;

...Expand

: 116-50-7
ethyleneglycol dibenzenesulfonate

A: 7782-99-2
sulphurous acid

B: 75-07-0
acetaldehyde

C: 98-11-3
benzenesulfonic acid

D: 74-86-2
acetylene

Conditions

Conditions	Yield
at 315℃; man halt dann die Temperatur bei 270grad;

...Expand

: 7647-01-0
hydrogenchloride

: 787485-97-6
p-phenetidino-methanesulfonic acid

A: 50-00-0
formaldehyd

B: 7782-99-2
sulphurous acid

C: 156-43-4
4-Ethoxyaniline

Conditions

Conditions	Yield
teils Spaltung;

...Expand

: sodium sulfide

: 7782-99-2
sulphurous acid

: 1310-73-2
sodium hydroxide

A: 7732-18-5
water

B: sodium thiosulfate

Conditions

Conditions	Yield
In water pure SO2 is introduced into alkaline Na2S soln.;	A n/a B 100%

...Expand

: 7782-99-2
sulphurous acid

: 7790-93-4
chloric acid

A: 7664-93-9
sulfuric acid

B: 10049-04-4, 25052-55-5
chlorine dioxide

C: 7732-18-5
water

Conditions

Conditions	Yield
With air; sulfur dioxide In sulfuric acid byproducts: HClO, HCl, Cl2; Holst-process;;	A n/a B 90% C n/a

...Expand

: sodium sulfide

: 7782-99-2
sulphurous acid

A: 7732-18-5
water

B: 7704-34-9
sulfur

C: sodium thiosulfate

Conditions

Conditions	Yield
In water pure SO2 is introduced into concd. Na2S soln. at 60°C;;	A n/a B n/a C 80%
In water at 20°C, aq. SO2 soln., diluted Na2S soln.;

...Expand

: sodium sulfide

: 7782-99-2
sulphurous acid

A: sodium hydrogen sulfide

B: 7732-18-5
water

C: sodium thiosulfate

Conditions

Conditions	Yield
In water in slightly acidic soln. (litmus); cyclic process;;	A n/a B n/a C 75%

...Expand

: ammonium hydroxide

: 7632-51-1
vanadiumtetrachloride

: 7782-99-2
sulphurous acid

: NH4(1+)*3V(3+)*6OH(1-)*2SO4(2-)=NH4V3(OH)6(SO4)2

Conditions

Conditions	Yield
In water VCl4 was added dropwise to ice-cold water, NH4OH and H2SO3 were added and heated in Teflon liner at 200°C for 3 d and cooled at 0.1°C/min to room temp.; product was washed with water and dried in air; elem. anal.;	47%

...Expand

: sodium sulfide

: 7782-99-2
sulphurous acid

A: 7783-06-4
hydrogen sulfide

B: 7732-18-5
water

C: sodium thiosulfate

D: 7757-83-7
sodium sulfite

Conditions

Conditions	Yield
In water a mixt. of 7% SO2 and 93% N2 is introduced into concd. Na2S soln. at 60°C;;	A n/a B n/a C 46% D n/a

...Expand

: sodium sulfide

: 7782-99-2
sulphurous acid

: 1310-73-2
sodium hydroxide

A: 7783-06-4
hydrogen sulfide

B: 7732-18-5
water

C: sodium thiosulfate

D: 7757-83-7
sodium sulfite

Conditions

Conditions	Yield
In water 7 % SO2;	A n/a B n/a C 37.5% D n/a

...Expand

: rubidium hydroxide

: 7632-51-1
vanadiumtetrachloride

: 7782-99-2
sulphurous acid

: RbV3(OH)6(SO4)2

Conditions

Conditions	Yield
In water VCl4 was added dropwise to ice-cold water, H2SO3, and RbOH were added and heated in Teflon liner at 205°C for 4 d and cooled at 0.1°C/min to room temp.; crystals were filtered, washed with water and dried in air; elem. anal.;	34%

...Expand

: 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℃;

...Expand

: 7664-93-9
sulfuric acid

: 79-31-2
isobutyric Acid

A: 7782-99-2
sulphurous acid

B carbon monoxide: carbon monoxide

Conditions

Conditions	Yield
at 140 - 155℃;

...Expand

: 17356-08-0
thiourea

alkaline alkali hypochlorite: alkaline alkali hypochlorite

A: 7782-99-2
sulphurous acid

B nitrogen: nitrogen

...Expand

: 64-17-5
ethanol

: 1939-99-7
benzenesulfonyl chloride

zinc: zinc

A: 620-32-6
dibenzyl sulfone

B: 4403-73-0
benzylsulfinic acid

C: 7782-99-2
sulphurous acid

D: 100-52-7
benzaldehyde

...Expand

: 646-07-1
4-Methylpentanoic acid

: 7664-93-9
sulfuric acid

: 7782-99-2
sulphurous acid

Conditions

Conditions	Yield
at 170℃;

: 115-24-2
sulfonal

zinc: zinc

hydrogen: hydrogen

: 7782-99-2
sulphurous acid

Conditions

Conditions	Yield
bei der Destillation;

...Expand

: 1-carbamimidoyl-3-carbamoyl-triazane-2-sulfonic acid

diluted natrium carbonate: diluted natrium carbonate

A: N'-carbamimidoyl-triazene-N-carboxylic acid amide

B: 7782-99-2
sulphurous acid

...Expand

: 1-ethoxycarbonyl-3-carbamimidoyl-triazane-2-sulfonic acid

diluted NaOH-solution: diluted NaOH-solution

A: N'-carbamimidoyl-triazene-N-carboxylic acid ethyl ester

B: 7782-99-2
sulphurous acid

...Expand

: 115-08-2
thiocarboxamide

: 7664-93-9
sulfuric acid

A: 7783-06-4
hydrogen sulfide

B: 7782-99-2
sulphurous acid

...Expand

: thionylacetate

: 7732-18-5
water

A: 7782-99-2
sulphurous acid

B: 64-19-7
acetic acid

...Expand

: 40757-83-3
2-hydroxy-2-sulfo-propionic acid

A: 7782-99-2
sulphurous acid

B: 127-17-3
2-oxo-propionic acid

Conditions

Conditions	Yield
Equilibrium constant; wss.-aethanol. Loesung vom pH 3,3 bei 20grad;

: sodium hydrogensulfite

: 127-06-0
acetone oxime

diluted acid: diluted acid

A: 7664-93-9
sulfuric acid

B: 7664-41-7
ammonia

C: 7782-99-2
sulphurous acid

D: 67-64-1
acetone

...Expand

: 1-carbamimidoyl-3-carbamoyl-triazane-2-sulfonic acid

diluted NaOH-solution: diluted NaOH-solution

A: 7782-99-2
sulphurous acid

B nitrogen: nitrogen

...Expand

Sulfurous acid 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.

Product Name

Sulfurous acid

Synthetic route

Sulfurous acid Specification

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