THIOUREA
Chemical Identification | |
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CAS # | 62-56-6 |
Formula |
CH₄N₂S |
Synonyms |
thiocarbamide; isothiourea; sulourea; 2-thiourea |
Physical Properties | |||
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Physical description | White or off-white crystals or powder. | ||
Boiling point | Sublimes in vacuum at 302-320°F | Molecular weight | 76.12 |
Freezing point/melting point | 349-352°F | Vapor pressure | |
Flash point | Vapor density | ||
Specific gravity | 1.405 at 68°F | Ionization potential | |
Lower explosive limit (LEL) | Upper explosive limit (UEL) | ||
NFPA health rating | NFPA fire rating | ||
NFPA reactivity rating | NFPA special instruction | ||
Vapor hazard ratio (VHR) | |||
Historical exceedance percentage | |||
Target organs |
Monitoring Methods Used by OSHA | ||||||
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Analyte code (IMIS no.) | T109 | |||||
Sampling group | ||||||
Sampler/Sampling media | GFF (37 mm), Type A/E [AP4003705] | |||||
Sampling time* | ||||||
Sampling volume (TWA)* | 480 L |
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Sampling flow rate (TWA)* | 2 L/min |
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Sampling volume (STEL/Peak/C)* | ||||||
Sampling flow rate (STEL/Peak/C)* | ||||||
Analytical method instruments | HPLC-UV | |||||
Method reference | OSHA PV2059 (partially validated) | |||||
Notes | ||||||
Special requirements |
* All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details.
Wipe Method | |
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Sampler/Sampling media |
Bulk Method |
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On-Site Screening Techniques | ||||||
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Device | ||||||
Model/Type | ||||||
Sampling information (see manufacturer instructions) |
Exposure Limits | |||||||
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OSHA PEL
8-hour TWA (ST) STEL (C) Ceiling Peak |
NIOSH REL
Up to 10-hour TWA (ST) STEL (C) Ceiling |
ACGIH TLV©
8-hour TWA (ST) STEL (C) Ceiling |
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PEL-TWA | REL-TWA | TLV-TWA | PEL-TWA | ||||
PEL-STEL | REL-STEL | TLV-STEL | PEL-STEL | ||||
PEL-C | REL-C | TLV-C | PEL-C | ||||
Skin notation |
NA |
Skin notation |
NA |
Skin notation |
NA |
Skin notation |
NA |
Notes:
Not established |
Notes:
Not established |
Notes:
Not established |
Notes:
Not established |
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Health factors: See NIH-NLM PubChem. | IDLH | ||||||
Carcinogenic classifications: IARC-3, NTP-R | Notes: | ||||||
AIHA emergency response planning guidelines - ERPG-1/ERPG-2/ERPG-3: |
Additional Resources and Literature References |
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NOAA: CAMEO Chemicals - Thiourea NIOSH: Pocket Guide to Chemical Hazards - Thiourea Literature References |
Last Updated Date : 01/13/2021