1,3-Dichloro-5,5-dimethylhydantoin
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CAS
118-52-5
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C5H6Cl2N2O2
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RTECS
MU0700000
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Synonyms & Trade Names
Dactin, DDH, Halane
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DOT ID & Guide
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Exposure
Limits
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NIOSH REL: TWA 0.2 mg/m3 ST 0.4 mg/m3
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OSHA PEL†: TWA 0.2 mg/m3
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IDLH
5 mg/m3
See: 118525
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Conversion
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Physical Description
White powder with a chlorine-like odor.
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MW: 197.0
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BP: ?
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MLT: 270°F
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Sol: 0.2%
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VP: ?
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IP: ?
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Sp.Gr: 1.5
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Fl.P: 346°F
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UEL: ?
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LEL: ?
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Combustible Solid
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Incompatibilities & Reactivities
Water, strong acids, easily oxidized materials such as ammonia salts & sulfides
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Measurement Methods
None available
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash
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First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash promptly
Breathing: Respiratory support
Swallow: Medical attention immediately
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Respirator Recommendations
NIOSH/OSHA
Up to 2 mg/m3:
(APF = 10) Any supplied-air respirator
Up to 5 mg/m3:
(APF = 25) Any supplied-air respirator operated in a continuous-flow mode
(APF = 50) Any self-contained breathing apparatus with a full facepiece
(APF = 50) Any supplied-air respirator with a full facepiece
Emergency or planned entry into unknown concentrations or IDLH conditions:
(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode
(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus
Escape:
(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern and having an N100, R100, or P100 filter. Click here for information on selection of N, R, or P filters./Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, ingestion, skin and/or eye contact
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Symptoms
Irritation eyes, mucous membrane, respiratory system
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Target Organs
Eyes, respiratory system
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