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Chemical Name:
DCDMH;hydan;DACTIN;daktin;halane;DANTOIN;omchlor;NSC 33307;NSC 38630;nci-c03054
Molecular Formula:
Formula Weight:
MOL File:

1,3-Dichloro-5,5-dimethylhydantoin Properties

Melting point:
132-134 °C(lit.)
1,5 g/cm3
refractive index 
1.5720 (estimate)
Flash point:
171 °C
storage temp. 
Store below +30°C.
water: soluble0.21% at 25°C(lit.)
Crystalline Powder
4.4 (H2O)(HSDB)
Water Solubility 
0.21 g/100 mL (25 ºC)
Moisture Sensitive
100 ºC
Stable, but a strong oxidizer - contact with combustible material may lead to fire. Incompatible with reducing agents, acids, strong bases. Moisture sensitive.
CAS DataBase Reference
118-52-5(CAS DataBase Reference)
EPA Substance Registry System
2,4-Imidazolidinedione, 1,3-dichloro-5,5-dimethyl- (118-52-5)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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
HazardClass  5.1
PackingGroup  II
HS Code  29332100
Hazardous Substances Data 118-52-5(Hazardous Substances Data)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H272 May intensify fire; oxidizer Oxidising liquids;Oxidising solids Category 2
Category 3
P210, P220, P221P280, P370+P378,P501
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitisation, respiratory Category 1 Danger P261, P285, P304+P341, P342+P311,P501
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H400 Very toxic to aquatic life Hazardous to the aquatic environment, acute hazard Category 1 Warning P273, P391, P501
H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P220 Keep/Store away from clothing/…/combustible materials.
P221 Take any precaution to avoid mixing with combustibles/…
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash hands thoroughly after handling.
P264 Wash skin thouroughly after handling.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P310 Immediately call a POISON CENTER or doctor/physician.
P391 Collect spillage. Hazardous to the aquatic environment
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P501 Dispose of contents/container to..…

1,3-Dichloro-5,5-dimethylhydantoin price More Price(8)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 232807 1,3-Dichloro-5,5-dimethylhydantoin available chlorine 68 % 118-52-5 250g $48.6 2018-11-13 Buy
Sigma-Aldrich 232807 1,3-Dichloro-5,5-dimethylhydantoin available chlorine 68 % 118-52-5 1kg $91.4 2018-11-13 Buy
TCI Chemical D1783 1,3-Dichloro-5,5-dimethylhydantoin >97.0%(T) 118-52-5 25g $9 2018-11-22 Buy
TCI Chemical D1783 1,3-Dichloro-5,5-dimethylhydantoin >97.0%(T) 118-52-5 100g $19 2018-11-22 Buy
Alfa Aesar A12718 1,3-Dichloro-5,5-dimethylhydantoin, 98% 118-52-5 500g $34 2018-11-13 Buy

1,3-Dichloro-5,5-dimethylhydantoin Chemical Properties,Uses,Production

Chemical Properties

DCDMH is a combustible, white powder. Chlorine-like odor.


Dantoin(R) DCDMH is an industrial bleaching agent based on dimethyl hydantoin. This product finds application wherever solid bleach is desired.


Dantoin(R) DCDMH LD (low dust) is an industrial bleaching agent based on dimethyl hydantoin. This product finds application wherever solid bleach is desired.


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.

Potential Exposure

It is used as a chlorinating agent, disinfectant, biocide, and laundry bleach. It is also used as a polymerization catalyst in making vinyl chloride; and in drug and pesticide synthesis.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit. Medical observation is recommended for 24 to 48 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy.


UN1479 Oxidizing solid, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, Technical Name Required

Purification Methods

Purify it by dissolving in conc H2SO4 and diluting with ice H2O, collect the solid, dry it in a vacuum and recrystallise it from CHCl3. It sublimes at 100o in a vacuum. It exhibits time-dependent hydrolysis at pH 9. [Petterson & Grzeskowiak J Org Chem 24 1414 1959, Beilstein 24 III/IV 1100.]


A strong oxidizer. Contact with water forms poisonous and corrosive gases. Mixtures with xylene may explode. Not compatible with moisture (especially hot water, steam), strong acids; easily oxidized materials (such as ammonia salts; sulfides, etc.); reducing agents; strong bases; ammonium salts; sulfides. Compounds of the carboxyl group react with all bases, both inorganic and organic (i.e., amines) releasing substantial heat, water and a salt that may be harmful. Incompatible with arsenic compounds (releases hydrogen cyanide gas), diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides (releasing heat, toxic and possibly flammable gases), thiosulfates and dithionites (releasing hydrogen sulfate and oxides of sulfur)

Waste Disposal

Incineration (815.5C/816C, 0.5 second for primary combustion; 104.4C/220F, 1.0 second for secondary combustion). The formation of elemental chlorine can be prevented by injection of steam or methane into the combustion process. Any nitrogen oxides may be abated by the use of thermal or catalytic devices

1,3-Dichloro-5,5-dimethylhydantoin Preparation Products And Raw materials

Raw materials

Preparation Products

1,3-Dichloro-5,5-dimethylhydantoin Suppliers

Global( 202)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Capot Chemical Co.,Ltd.
+86 (0)571-855 867 18
+86 (0)571-858 647 95 China 19958 60
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22060 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20795 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32764 55
career henan chemical co
+86-371-86658258 CHINA 20001 58
Kono Chem Co., Ltd
+86-132 8924 6953 CHINA 2164 58
Beijing HuaYangZhicheng Technology Co., Ltd. 13716033033
010-56276266 China 4670 50
Weifang Kaihong Chemical Limited 86-536-8865335,13953637678
86-536-5310398 China 64 55
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96815 76
3B Pharmachem (Wuhan) International Co.,Ltd. 86-21-50328103 * 801、802、803、804 Mobile:18930552037
86-21-50328109 China 15940 69

View Lastest Price from 1,3-Dichloro-5,5-dimethylhydantoin manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-17 1,3-Dichloro-5,5-dimethylhydantoin
US $7.00 / kg 1kg 99% 100kg career henan chemical co

1,3-Dichloro-5,5-dimethylhydantoin Spectrum

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