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Name	4,5-IMIDAZOLIDINEDITHIONE	EINECS	209-145-6
CAS No.	556-90-1	Density	1.78 g/cm³
PSA	80.75000	LogP	-0.28960
Solubility	N/A	Melting Point	249 °C (dec.)(lit.)
Formula	C3H4 N2 O S	Boiling Point	253.5 °C at 760 mmHg
Molecular Weight	116.144	Flash Point	107.1 °C
Transport Information	N/A	Appearance	white to light yellow powder
Safety	Poison by intraperitoneal and intravenous routes. When heated to decomposition it emits very toxic fumes of NO_x and SO_x.	Risk Codes	N/A
Molecular Structure		Hazard Symbols	Xi
Synonyms	2-Thiazolin-4-one,2-amino- (7CI); 4-Thiazolidinone, 2-imino- (8CI); Pseudothiohydantoin (6CI);2-Amino-2-thiazolin-4-one; 2-Amino-4-oxothiazoline; 2-Aminothiazol-4-one;2-Imino-4-thiazolidinone; 2-Imino-4-thiazolidone; NSC 2858; NSC 45956	Article Data	65

4,5-IMIDAZOLIDINEDITHIONE Chemical Properties

IUPAC Name: 2-Amino-1,3-thiazol-4-one
Synonyms: 2-Amino-1,3-thiazol-4(5H)-one ; 4(5H)-Thiazolone, 2-amino- ; 2-Amino-2-thiazolin-4-one ; 2-Amino-2-thiazolin-4-one ; 2-Amino-4,5-dihydro-1,3-thiazol-4-one ; 2-Imino-1,3-thiazol-4-one ; 2-Imino-1,3-thiazolidin-4-one ; 2-Imino-4-thiazolidinone ; 2-Imino-4-thiazolidone
Product Categories: Amines;Thiazoles, Isothiazoles &Benzothiazoles;Thiazoles, Isothiazoles & Benzothiazoles;Building Blocks;Heterocyclic Building Blocks;Thiazolines/Thiazolidines
CAS NO: 556-90-1
Molecular Formula: C₃H₄N₂OS
Molecular Weight:116.1417
Molecular Structure:
EINECS: 209-145-6
Mol File: 556-90-1.mol
Index of Refraction: 1.785
Surface Tension: 84.5 dyne/cm
Density: 1.78 g/cm³
Flash Point: 107.1 °C
Melting point: 249 °C (dec.)(lit.)
Enthalpy of Vaporization: 49.09 kJ/mol
Boiling Point: 253.5 °C at 760 mmHg
Vapour Pressure: 0.0182 mmHg at 25°C
Appearance: 4,5-Imidazolidinedithione (CAS NO. 556-90-1) is white to yellowish fine needles or powder.

4,5-IMIDAZOLIDINEDITHIONE Uses

4,5-Imidazolidinedithione (CAS NO. 556-90-1) is used as fine chemicals and pharmaceutical intermediates.

4,5-IMIDAZOLIDINEDITHIONE Toxicity Data With Reference

1.		ipr-mus LD50:100 mg/kg		NTIS** National Technical Information Service. (Springfield, VA 22161) (Formerly U.S. Clearinghouse for Scientific and Technical Information) AD277-689 .
2.		ivn-mus LD50:320 mg/kg		CSLNX* U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. (Aberdeen Proving Ground, MD 21010) NX#02090 .

4,5-IMIDAZOLIDINEDITHIONE Consensus Reports

Reported in EPA TSCA Inventory.

4,5-IMIDAZOLIDINEDITHIONE Safety Profile

Poison by intraperitoneal and intravenous routes. When heated to decomposition it emits very toxic fumes of NO_x and SO_x.

Hazard Codes Irritant Xi
Safety Statements 24/25
S24/25: When 4,5-Imidazolidinedithione (CAS NO. 556-90-1) is used ,avoid contact with skin and eyes.
WGK Germany 3
RTECS XJ6276000

4,5-IMIDAZOLIDINEDITHIONE Specification

General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Extinguishing Media: Use agent most appropriate to extinguish fire.
Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Storage: Store in a cool, dry place. Keep container closed when not in use.

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