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4189-44-0

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Basic Information
CAS No.: 4189-44-0
Name: THIOUREA DIOXIDE
Article Data: 5
Molecular Structure:
Molecular Structure of 4189-44-0 (THIOUREA DIOXIDE)
Formula: CH4N2O2S
Molecular Weight: 108.121
Synonyms: Methanesulfinicacid, aminoimino- (8CI,9CI);Formamidine sulfinate;Formamidinesulfinic acid;NSC226979;NSC 34540;Rucorit RGH;Tec Light;Thiourea peroxide;
EINECS: 224-065-1
Density: 2.254 g/cm3
Melting Point: 126 °C
Solubility: 30 g/L (20℃)
Appearance: White crystal powder, odorless
Hazard Symbols: R22:; R36/37/38:;
Risk Codes:  Xn:Harmful;
">  Xn:Harmful;
PSA: 118.27000
LogP: 0.35170
Related products
Synthetic route
17356-08-0

thiourea

4189-44-0

thiourea S,S-dioxide

Conditions
ConditionsYield
With dihydrogen peroxide; ammonium carbonate In water at 8℃; for 2.5h; pH=5 - 5.5;80%
With dihydrogen peroxide In water at 10℃;64%
With tert.-butylhydroperoxide In methanol; tert-butyl alcohol for 0.666667h; Ambient temperature;
With perchloric acid; potassium peroxomonosulfate In water at 30℃; Kinetics; Temperature;
4189-44-0

thiourea S,S-dioxide

C-(3λ4-Dioxathiiran-3-ylidene)-methanediamine

Conditions
ConditionsYield
In [D3]acetonitrile at 45℃; Rate constant;
4189-44-0

thiourea S,S-dioxide

A

17356-08-0

thiourea

B

57-13-6

urea

Conditions
ConditionsYield
In acetonitrile for 0.7h; Heating; Yield given;
4189-44-0

thiourea S,S-dioxide

113-00-8

guanidine nitrate

Conditions
ConditionsYield
With ammonia; oxygen In water at 24.85℃; Kinetics;
4189-44-0

thiourea S,S-dioxide

78-81-9

isobutylamine

69724-02-3

isobutyl-guanidine

Conditions
ConditionsYield
With oxygen In water at 24.85℃; Kinetics;
4189-44-0

thiourea S,S-dioxide

74-89-5

methylamine

471-29-4

1-methylguanidine

Conditions
ConditionsYield
With oxygen In water at 24.85℃; Kinetics;
4189-44-0

thiourea S,S-dioxide

57-13-6

urea

Conditions
ConditionsYield
With oxygen In water at 24.84℃; pH=10.0; Kinetics; Further Variations:; pH-values; Reagents;

sodium hexachlororhodate(III)

4189-44-0

thiourea S,S-dioxide

12340-43-1

Rh(2+)*(NH2)2CSO2*SO3(2-)*H2O=Rh((NH2)2CSO2)SO3*H2O

Conditions
ConditionsYield
In hydrogenchloride in dilute HCl;

sodium hexachlororhodate(III)

4189-44-0

thiourea S,S-dioxide

Rh(1+)*(NH2)2CSO2*HSO3(1-)*H2O=Rh((NH2)2CSO2)HSO3*H2O

Conditions
ConditionsYield
In hydrogenchloride in dilute HCl;

sodium hexachlororhodate(III)

4189-44-0

thiourea S,S-dioxide

Rh(2+)*(NH2)2CSO2*2Cl(1-)*H2O=Rh((NH2)2CSO2)Cl2*H2O

Conditions
ConditionsYield
In hydrogenchloride in concd. HCl soln.;
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Chemistry

Molecular Structure of Methanesulfinic acid,1-amino-1-imino- (CAS NO.4189-44-0):

Molecular Formula: CH3N2O2S
Molecular Weight: 107.1123
IUPAC Name: Amino(imino)methanesulfinate
Synonyms of Methanesulfinic acid,1-amino-1-imino- (CAS NO.4189-44-0): BRN 1902754 ; CCRIS 6695 ; EINECS 224-065-1 ; Thiourea dioxide ; Thiourea S,S-dioxide ; Thiourea, S,S-dioxide ; Urea, thio-, 2,2-dioxide
CAS NO: 4189-44-0
Melting point: 126 °C 
Flash Point: 168.7 °C
Enthalpy of Vaporization: 65.96 kJ/mol
Boiling Point: 355.3 °C at 760 mmHg
Vapour Pressure of Methanesulfinic acid,1-amino-1-imino- (CAS NO.4189-44-0): 5.27E-06 mmHg at 25°C

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rat LD50 intraperitoneal 423mg/kg (423mg/kg)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 16(6), Pg. 51, 1972.