Material Safety Data Sheet
1,3-Dichloro-5,5-dimethylhydantoin min. available chlorine 66%

ACC# 84589
Section 1 - Chemical Product and Company Identification
MSDS Name: 1,3-Dichloro-5,5-dimethylhydantoin min. available chlorine 66%
Catalog Numbers: AC214220000, AC214220010, AC214220050, AC214222500
Dichlorantin; Dactin; DCDMH; Halane; 1,3-Dichloro-5,5-dimethyl-2,4-imidazolidinedione.
Company Identification:

              Acros Organics N.V.
              One Reagent Lane
              Fair Lawn, NJ 07410
For information in North America, call: 800-ACROS-01
For emergencies in the US, call CHEMTREC: 800-424-9300

Section 2 - Composition, Information on Ingredients

CAS# Chemical Name Percent EINECS/ELINCS
118-52-5 1,3-Dichloro-5,5-dimethylhydantoin 100 204-258-7

Section 3 - Hazards Identification


Appearance: white crystalline powder.
Danger! Contact with water liberates corrosive vapors. Strong oxidizer. Contact with other material may cause a fire. Causes eye, skin, and respiratory tract irritation. May be harmful if swallowed. Moisture sensitive.
Target Organs: Respiratory system, eyes, skin.

Potential Health Effects
Eye: Causes eye irritation.
Skin: Causes skin irritation.
Ingestion: Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed. Hemorrhages of the GI tract.
Inhalation: Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
Chronic: Repeated inhalation may cause chronic bronchitis.

Section 4 - First Aid Measures

Eyes: In case of contact, immediately flush eyes with plenty of water for a t least 15 minutes. Get medical aid immediately.
Skin: Get medical aid immediately. In case of contact, immediately wipe away excess material with a dry cloth while removing contaminated clothing and shoes. Under safety shower, wash affected areas thoroughly with large amounts of water, and soap if available, for at least 15 minutes. Discard or decontaminate clothing and shoes.
Ingestion: If swallowed, do NOT induce vomiting. Get medical aid immediately. If victim is fully conscious, give a cupful of water. Never give anything by mouth to an unconscious person.
Inhalation: If inhaled, remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
Notes to Physician: Treat symptomatically and supportively.

Section 5 - Fire Fighting Measures

General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Strong oxidizer. Contact with other material may cause fire. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion.
Extinguishing Media: Do NOT get water inside containers. Use dry chemical, carbon dioxide, or halon extinguisher.
Flash Point: 191 deg C ( 375.80 deg F)
Autoignition Temperature: Not available.
Explosion Limits, Lower:Not available.
Upper: Not available.
NFPA Rating: (estimated) Health: 3; Flammability: 1; Instability: 0; Special Hazard: OX

Section 6 - Accidental Release Measures

General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks: Clean up spills immediately, observing precautions in the Protective Equipment section. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation. Do not get water inside containers.

Section 7 - Handling and Storage

Handling: Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Do not allow contact with water. Keep from contact with clothing and other combustible materials. Keep from contact with moist air and steam.
Storage: Keep container closed when not in use. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture. DCDMH can be stored without significant loss of chlorine. At 60C after 14 weeks, chlorine loss was 1.5%.

Section 8 - Exposure Controls, Personal Protection

Engineering Controls: Facilities storing or utilizing this material should be equipped with an eyewash facility and a safety shower. Use adequate ventilation to keep airborne concentrations low.
Exposure Limits
Chemical Name ACGIH NIOSH OSHA - Final PELs
1,3-Dichloro-5,5-dimethylhydantoin 0.2 mg/m3 TWA; 0.4 mg/m3 STEL 0.2 mg/m3 TWA 5 mg/m3 IDLH 0.2 mg/m3 TWA

OSHA Vacated PELs: 1,3-Dichloro-5,5-dimethylhydantoin: 0.2 mg/m3 TWA
Personal Protective Equipment
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166.
Skin: Wear appropriate gloves to prevent skin exposure.
Clothing: Wear appropriate clothing to prevent skin exposure.
Respirators: Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - Physical and Chemical Properties

Physical State: Crystalline powder
Appearance: white
Odor: chlorine-like
pH: ~4.4 (aq. soln.)
Vapor Pressure: Not available.
Vapor Density: 6.8 (air=1)
Evaporation Rate:Not available.
Viscosity: Not available.
Boiling Point: Decomposes
Freezing/Melting Point:131-136 deg C
Decomposition Temperature:191 deg C
Solubility: 0.21% @ 25C
Specific Gravity/Density:1.5 g/cm3 @ 20/20C
Molecular Formula:C5H6Cl2N2O2
Molecular Weight:197.02

Section 10 - Stability and Reactivity

Chemical Stability: Stable at room temperature in closed containers under normal storage and handling conditions.
Conditions to Avoid: Moisture, excess heat.
Incompatibilities with Other Materials: Strong reducing agents, strong acids, strong bases, water, easily oxidizable materials.
Hazardous Decomposition Products: Hydrogen chloride, chlorine, nitrogen oxides, phosgene, carbon monoxide, carbon dioxide, hypochlorous acid.
Hazardous Polymerization: Has not been reported.

Section 11 - Toxicological Information

CAS# 118-52-5: MU0700000
CAS# 118-52-5:
     Draize test, rabbit, skin: 500 mg/24H Severe;
     Draize test, rabbit, skin: 100 mg/24H Severe;
     Oral, rabbit: LD50 = 1520 mg/kg;
     Oral, rat: LD50 = 542 mg/kg;
     Skin, rabbit: LD50 = >20 gm/kg;

CAS# 118-52-5: Not listed by ACGIH, IARC, NTP, or CA Prop 65.

Epidemiology: No information available.
Teratogenicity: No information available.
Reproductive Effects: No information available.
Mutagenicity: No information available.
Neurotoxicity: No information available.
Other Studies:

Section 12 - Ecological Information

No information available.

Section 13 - Disposal Considerations

Chemical waste generators must determine whether a discarded chemical is classified as a hazardous waste. US EPA guidelines for the classification determination are listed in 40 CFR Parts 261.3. Additionally, waste generators must consult state and local hazardous waste regulations to ensure complete and accurate classification.
RCRA P-Series: None listed.
RCRA U-Series: None listed.

Section 14 - Transport Information

Shipping Name: OXIDIZING SOLID, CORROSIVE, N.O.S. No information available.
Hazard Class: 5.1
UN Number: UN3085
Packing Group: II

Section 15 - Regulatory Information


     CAS# 118-52-5 is listed on the TSCA inventory.
Health & Safety Reporting List
     None of the chemicals are on the Health & Safety Reporting List.
Chemical Test Rules
     None of the chemicals in this product are under a Chemical Test Rule.
Section 12b
     None of the chemicals are listed under TSCA Section 12b.
TSCA Significant New Use Rule
     None of the chemicals in this material have a SNUR under TSCA.
CERCLA Hazardous Substances and corresponding RQs
     None of the chemicals in this material have an RQ.
SARA Section 302 Extremely Hazardous Substances
     None of the chemicals in this product have a TPQ.
Section 313      No chemicals are reportable under Section 313.
Clean Air Act:
     This material does not contain any hazardous air pollutants.
     This material does not contain any Class 1 Ozone depletors.
     This material does not contain any Class 2 Ozone depletors.
Clean Water Act:
     None of the chemicals in this product are listed as Hazardous Substances under the CWA.
     None of the chemicals in this product are listed as Priority Pollutants under the CWA.
     None of the chemicals in this product are listed as Toxic Pollutants under the CWA.
     None of the chemicals in this product are considered highly hazardous by OSHA.
     CAS# 118-52-5 can be found on the following state right to know lists: California, New Jersey, Pennsylvania, Minnesota, Massachusetts.

California Prop 65

California No Significant Risk Level: None of the chemicals in this product are listed.

European/International Regulations

European Labeling in Accordance with EC Directives
Hazard Symbols:
     XN O
Risk Phrases:

     R 22 Harmful if swallowed.
     R 36/37/38 Irritating to eyes, respiratory system and skin.
     R 8 Contact with combustible material may cause fire.

Safety Phrases:

     S 24/25 Avoid contact with skin and eyes.

WGK (Water Danger/Protection)

     CAS# 118-52-5: No information available.
Canada - DSL/NDSL
     CAS# 118-52-5 is listed on Canada's DSL List.
Canada - WHMIS
     This product has a WHMIS classification of D2B, C.
This product has been classified in accordance with the hazard criteria of the Controlled Products Regulations and the MSDS contains all of the information required by those regulations.
Canadian Ingredient Disclosure List
     CAS# 118-52-5 is listed on the Canadian Ingredient Disclosure List.

Section 16 - Additional Information

MSDS Creation Date: 12/15/1998
Revision #5 Date: 11/20/2008

The information above is believed to be accurate and represents the best information currently available to us. However, we make no warranty of merchantability or any other warranty, express or implied, with respect to such information, and we assume no liability resulting from its use. Users should make their own investigations to determine the suitability of the information for their particular purposes. In no event shall Fisher be liable for any claims, losses, or damages of any third party or for lost profits or any special, indirect, incidental, consequential or exemplary damages, howsoever arising, even if Fisher has been advised of the possibility of such damages.