Product Name: 1,3-Dichloro-5,5-dimethylhydantoin
Synonyms: DCDMH;DANTOIN;DACTIN;DICHLORO-DIMETHYL-HYDANTOINE;1,3-DICHLORO-5,5-DIMETHYL-2,4-IMIDAZOLIDINEDIONE;1,3-DICHLORO-5,5-DIMETHYLHYDANTOIN;1,3-DICHLORO-5,5-DIMETHYLHYDANTOINE;1,3-dichloro-5,5’-methylhydantoin
CAS: 118-52-5
MF: C5H6Cl2N2O2
MW: 197.02
EINECS: 204-258-7
Product Categories: water treatment;Pyridines;Miscellaneous;Water treatment chemicals;Water Ttreatment Chemicals;Imidazolines/ImidazolidinesBuilding Blocks;Halogenated Heterocycles;Heterocyclic Building Blocks;Imidazolines/Imidazolidines
Mol File: 118-52-5.mol

1,3-Dichloro-5,5-dimethylhydantoin Chemical Properties
Melting point  132-134 °C(lit.)
Boiling point  214.7±23.0 °C(Predicted)
density  1,5 g/cm3
refractive index  1.5720 (estimate)
Fp  171 °C
storage temp.  Store below +30°C.
solubility  water: soluble0.21% at 25°C(lit.)
form  Crystalline Powder
pka -3.44±0.40(Predicted)
color  White
PH 4.4 (H2O)(HSDB)
Water Solubility  0.21 g/100 mL (25 ºC)
Sensitive  Moisture Sensitive
Merck  14,3065
Sublimation  100 ºC
BRN  146013
Exposure limits NIOSH REL: TWA 0.2, STEL 0.4, IDLH 5; OSHA PEL: TWA 0.2, STEL/C 0.4 (adopted).
Stability: Stable, but a strong oxidizer - contact with combustible material may lead to fire. Incompatible with reducing agents, acids, strong bases. Moisture sensitive.
InChIKey KEQGZUUPPQEDPF-UHFFFAOYSA-N
CAS DataBase Reference 118-52-5(CAS DataBase Reference)
EPA Substance Registry System 1,3-Dichloro-5,5-dimethylhydantoin (118-52-5)
Safety Information
Hazard Codes  Xn,C,O,N
Risk Statements  22-36/37/38-34-8-50-43-31-20/21/22
Safety Statements  26-36-45-36/37/39-17-61
RIDADR  UN 1479 5.1/PG 2
WGK Germany  3
RTECS  MU0700000
TSCA  Yes
HazardClass  5.1
PackingGroup  II
HS Code  29332100
Hazardous Substances Data 118-52-5(Hazardous Substances Data)
Toxicity LD50 oral in rabbit: 1520mg/kg

1,3-Dichloro-5,5-dimethylhydantoin Usage And Synthesis
Chemical Properties DCDMH is a combustible, white powder. Chlorine-like odor.
Physical properties White powder or four-sided crystals from chloroform with a chlorine-like odor. Aqueous solutions are acidic.
Uses Dantoin(R) DCDMH is an industrial bleaching agent based on dimethyl hydantoin. This product finds application wherever solid bleach is desired.
Uses Dantoin(R) DCDMH LD (low dust) is an industrial bleaching agent based on dimethyl hydantoin. This product finds application wherever solid bleach is desired.
Definition Methionine hydroxy analog c. 90%.
General Description White powder with a weak chlorine odor. Conflagrates at 414°F (turns brown). Chlorine gas evolves > 410°F.
Air & Water Reactions Sensitive to exposure to light, air, and moisture. Reacts with water or steam to produce toxic and corrosive fumes.
Reactivity Profile 1,3-Dichloro-5,5-dimethylhydantoin reacts violently with xylene. 1,3-Dichloro-5,5-dimethylhydantoin is incompatible with strong acids, easily oxidized materials, ammonia salts and sulfides. 1,3-Dichloro-5,5-dimethylhydantoin will react with water or steam to produce toxic and corrosive fumes. At a pH of 9, 1,3-Dichloro-5,5-dimethylhydantoin decomposes completely.
Fire Hazard Flash point data for 1,3-Dichloro-5,5-dimethylhydantoin are not available. 1,3-Dichloro-5,5-dimethylhydantoin is probably combustible.
Safety Profile Moderately toxic by ingestion. Mildly toxic by inhalation. A severe slun irritant. Mutation data reported. Avoid excessive contact because of effects of active chlorine on skin. Some of the hydantoins are central nervous system depressants. Mixtures with xylene may explode. Wdl react with water or steam to produce toxic and corrosive fumes. When heated to decomposition it emits toxic fumes of Cl and NOx. See also CHLORIDES.

Product Name: 1,3-Dichloro-5,5-dimethylhydantoin
Synonyms: DCDMH;DANTOIN;DACTIN;DICHLORO-DIMETHYL-HYDANTOINE;1,3-DICHLORO-5,5-DIMETHYL-2,4-IMIDAZOLIDINEDIONE;1,3-DICHLORO-5,5-DIMETHYLHYDANTOIN;1,3-DICHLORO-5,5-DIMETHYLHYDANTOINE;1,3-dichloro-5,5’-methylhydantoin
CAS: 118-52-5
MF: C5H6Cl2N2O2
MW: 197.02
EINECS: 204-258-7
Product Categories: water treatment;Pyridines;Miscellaneous;Water treatment chemicals;Water Ttreatment Chemicals;Imidazolines/ImidazolidinesBuilding Blocks;Halogenated Heterocycles;Heterocyclic Building Blocks;Imidazolines/Imidazolidines
Mol File: 118-52-5.mol

1,3-Dichloro-5,5-dimethylhydantoin Chemical Properties
Melting point  132-134 °C(lit.)
Boiling point  214.7±23.0 °C(Predicted)
density  1,5 g/cm3
refractive index  1.5720 (estimate)
Fp  171 °C
storage temp.  Store below +30°C.
solubility  water: soluble0.21% at 25°C(lit.)
form  Crystalline Powder
pka -3.44±0.40(Predicted)
color  White
PH 4.4 (H2O)(HSDB)
Water Solubility  0.21 g/100 mL (25 ºC)
Sensitive  Moisture Sensitive
Merck  14,3065
Sublimation  100 ºC
BRN  146013
Exposure limits NIOSH REL: TWA 0.2, STEL 0.4, IDLH 5; OSHA PEL: TWA 0.2, STEL/C 0.4 (adopted).
Stability: Stable, but a strong oxidizer - contact with combustible material may lead to fire. Incompatible with reducing agents, acids, strong bases. Moisture sensitive.
InChIKey KEQGZUUPPQEDPF-UHFFFAOYSA-N
CAS DataBase Reference 118-52-5(CAS DataBase Reference)
EPA Substance Registry System 1,3-Dichloro-5,5-dimethylhydantoin (118-52-5)
Safety Information
Hazard Codes  Xn,C,O,N
Risk Statements  22-36/37/38-34-8-50-43-31-20/21/22
Safety Statements  26-36-45-36/37/39-17-61
RIDADR  UN 1479 5.1/PG 2
WGK Germany  3
RTECS  MU0700000
TSCA  Yes
HazardClass  5.1
PackingGroup  II
HS Code  29332100
Hazardous Substances Data 118-52-5(Hazardous Substances Data)
Toxicity LD50 oral in rabbit: 1520mg/kg

1,3-Dichloro-5,5-dimethylhydantoin Usage And Synthesis
Chemical Properties DCDMH is a combustible, white powder. Chlorine-like odor.
Physical properties White powder or four-sided crystals from chloroform with a chlorine-like odor. Aqueous solutions are acidic.
Uses Dantoin(R) DCDMH is an industrial bleaching agent based on dimethyl hydantoin. This product finds application wherever solid bleach is desired.
Uses Dantoin(R) DCDMH LD (low dust) is an industrial bleaching agent based on dimethyl hydantoin. This product finds application wherever solid bleach is desired.
Definition Methionine hydroxy analog c. 90%.
General Description White powder with a weak chlorine odor. Conflagrates at 414°F (turns brown). Chlorine gas evolves > 410°F.
Air & Water Reactions Sensitive to exposure to light, air, and moisture. Reacts with water or steam to produce toxic and corrosive fumes.
Reactivity Profile 1,3-Dichloro-5,5-dimethylhydantoin reacts violently with xylene. 1,3-Dichloro-5,5-dimethylhydantoin is incompatible with strong acids, easily oxidized materials, ammonia salts and sulfides. 1,3-Dichloro-5,5-dimethylhydantoin will react with water or steam to produce toxic and corrosive fumes. At a pH of 9, 1,3-Dichloro-5,5-dimethylhydantoin decomposes completely.
Fire Hazard Flash point data for 1,3-Dichloro-5,5-dimethylhydantoin are not available. 1,3-Dichloro-5,5-dimethylhydantoin is probably combustible.
Safety Profile Moderately toxic by ingestion. Mildly toxic by inhalation. A severe slun irritant. Mutation data reported. Avoid excessive contact because of effects of active chlorine on skin. Some of the hydantoins are central nervous system depressants. Mixtures with xylene may explode. Wdl react with water or steam to produce toxic and corrosive fumes. When heated to decomposition it emits toxic fumes of Cl and NOx. See also CHLORIDES.