1,3-Dichloro-5,5-dimethylhydantoin

1,3-Dichloro-5,5-dimethylhydantoin

2,4-Imidazolidinedione,1,3-dichloro-5,5-dimethyl-;Hydantoin,1,3-dichloro-5,5-dimethyl-;1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione;Dactin;Dantoin;Dichlorodimethylhydantoin;1,3-Dichloro-5,5-dimethylhydantoin;Halane;Hydan (antiseptic);Dichlorantin;Daktin;Hydan;N,N′-Dichloro-5,5-dimethylhydantoin;N,N′-Dichlorodimethylhydantoin;Dantochlor RW;DCDMH;NSC 33307;NSC 38630;2,4-Dichloro-5,5-dimethylhydantoin;Sulfochlorantin D

118-52-5

C5H6Cl2N2O2

InChIKey=KEQGZUUPPQEDPF-UHFFFAOYSA-N

197.015

197.02

204-258-7

70H8B2WWTU

38630|33307

1479

DTXSID4024985

Four-sided, pointed prisms from chloroform|White powder

29332100

Bulk Drug Intermediates

40.6

1.1

1,3-dichloro-5,5-dimethylhydantoin is a white powder with a weak chlorine odor. Conflagrates at 414°F (turns brown). Chlorine gas evolves at temperatures > 410°F. (NTP, 1992)

1.5 g/cm³ @ Temp: 20 °C

132 °C

212° (sublimes)

346°F

1.5720 (estimate)

water: soluble 0.21% at 25°C(lit.)

Safe Storage of Pesticides. Always store pesticides in their original containers, complete with labels that list ingredients, directions for use, and first aid steps in case of accidental poisoning. Never store pesticides in cabinets with or near food, animal feed, or medical supplies. Do not store pesticides in places where flooding is possible or in places where they might spill or leak into wells, drains, ground water, or surface water.

2.4X10-5 mm Hg at 25 deg C (est)

6.8

LD50 oral in rabbit: 1520mg/kg

Combustible Solid

Chlorine-like odor

pH of aqueous soln about 4.4

Henry's Law constant = 1.0X10-6 atm-cu m/mole at 25 °C (est)

Sublimes at 100 °C; turns brown and conflagrates at 212 °C (after melting at 132 °C); on contact with water and especially hot water hypochlorous acid is liberated, at pH 9 nitrogen chloride is formed|At pH 9 it decomposes completely|Hydroxy radical reaction rate constant = 3.1X10-12 cu cm/molec-sec at 25 °C (est)

Sensitive to exposure to light, air, and moisture. Reacts with water or steam to produce toxic and corrosive fumes.

Acyl Halides, Sulfonyl Halides, and Chloroformates

Strong Oxidizing Agent

1,3-DICHLORO-5,5-DIMETHYLHYDANTOIN reacts violently with xylene. It is incompatible with strong acids, easily oxidized materials, ammonia salts and sulfides. It will react with water or steam to produce toxic and corrosive fumes. At a pH of 9, it decomposes completely. (NTP, 1992)

Combustible Solid

PRESUMABLY LESS CORROSIVE THAN HYPOCHLORITE SOLUTIONS WITH SAME CONCN OF AVAILABLE CHLORINE