THIOUREA
| Chemical Identification | |
|---|---|
| CAS # | 62-56-6 |
| Formula |
CH₄N₂S |
| Synonyms |
thiocarbamide; isothiourea; sulourea; 2-thiourea |
| Physical Properties | |||
|---|---|---|---|
| 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 | ||||||
|---|---|---|---|---|---|---|
| Analyte code (IMIS no.) | T109 | |||||
| Sampling group | ||||||
| Sampler/Sampling media | GFF (37 mm), Type A/E [AP4003705] | |||||
| Sampling time* | ||||||
| Sampling volume (TWA)* | 480 L |
|||||
| Sampling flow rate (TWA)* | 2 L/min |
|||||
| 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 | |
|---|---|
| Sampler/Sampling media | |
| Bulk Method |
|---|
| On-Site Screening Techniques | ||||||
|---|---|---|---|---|---|---|
| Device | ||||||
| Model/Type | ||||||
|
Sampling information (see manufacturer instructions) |
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| Exposure Limits | |||||||
|---|---|---|---|---|---|---|---|
|
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 |
|||||
| 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 |
||||
| 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 |
|---|
|
NOAA: CAMEO Chemicals - Thiourea NIOSH: Pocket Guide to Chemical Hazards - Thiourea Literature References |
Last Updated Date : 01/13/2021