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        Syndicate





1,3-Dichloro-5,5-dimethylhydantoin																				Related Pages
Synonyms & Trade Names
			Dactin, DDH, Halane
CAS No.
			118-52-5
	RTECS No.
			MU0700000
	DOT ID & Guide

FormulaC5H6Cl2N2O2
	Conversion
	IDLH
			5 mg/m3See: 118525

Exposure Limits
			NIOSH RELTWA 0.2 mg/m3 ST 0.4 mg/m3OSHA PEL TWA 0.2 mg/m3See Appendix G
	Measurement Methods
			None available 
					
					See: NMAM or OSHA Methods
										
Physical Description
			White powder with a chlorine-like odor.													
										
Molecular Weight197.0	
	Boiling Point?
	Melting Point270°F
	Solubility0.2%
	Vapor Pressure?
	Ionization Potential?											
Specific Gravity1.5	
	Flash Point346°F
	Upper Explosive Limit?
	Lower Explosive Limit?
Combustible Solid
Incompatibilities & Reactivities
			Water, strong acids, easily oxidized materials such as ammonia salts & sulfides
Exposure Routes
			inhalation, ingestion, skin and/or eye contact
Symptoms
			irritation eyes, mucous membrane, respiratory system
Target Organs
			Eyes, respiratory system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated
							**Remove:**When wet or contaminated
							**Change:**Daily
							**Provide:**Eyewash
	First Aid
			(See procedures)**Eye:**Irrigate immediately
							**Skin:**Soap wash promptly
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately
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
See also
			INTRODUCTION

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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CAS Numbers
RTECS Numbers
Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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