Substance profile
Benzothiazole-2-thiol
Benzothiazole-2-thiol is pale, yellow monoclinic needles or leaflets with a disagreeable odor.
01 · Identification
What Benzothiazole-2-thiol is
Benzothiazole-2-thiol is pale, yellow monoclinic needles or leaflets with a disagreeable odor. Its molecular formula is C7H5NS2 and its molecular weight is 167.3 g/mol. It melts at 181 °C.
Under the GHS it carries the signal word Warning.
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P261, P272, P273, P280, P313, P333, P391, P501
03 · Physical and chemical properties
Benzothiazole-2-thiol properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | Not determinable experimentally by EU Method A.2 (Boiling Temperature) due to overlapping endothermic and exothermic reactions. | HSDB | |
| Decomposes (NTP, 1992) | decomposes | CAMEO | |
| Melting point | 181 °C (357.8 °F) | DOE PAC | |
| 180.95 °C (357.7 °F) | range, midpoint shown | HSDB | |
| 171.5 °C (340.7 °F) | range, midpoint shown | HSDB | |
| Density | 1.42 g/cm³ | ICSC | |
| 1.42 g/cm³ | at 20 °C | HSDB | |
| Solubility | In pure water, 120 mg/L at 24 °C; in buffered creek water at 24 °C, 190 mg/L (pH 6.5), 230 mg/l (pH 7.5), 260 mg/L (pH 8.5) | at 24 °C | HSDB |
| In water at 25 °C, 51 mg/L (pH 5), 118 mg/L (pH 7), 900 mg/L (pH 9) | at 25 °C | HSDB | |
| Vapor pressure | 2.25e-8 mmHg | at 20 °C | HSDB |
| 0.000464 mmHg | Haz-Map | ||
| Flash point | 200 °C (392 °F) | CAMEO | |
| 243 °C (469.4 °F) | ICSC | ||
| Autoignition temperature | 628 °C (1162.4 °F) | ICSC | |
| Lower explosive limit (LEL) | Combustible. | HSDB | |
| Explosive limits , vol% in air: 15-? | ICSC | ||
| Odor threshold | Odor Threshold Low: 2.0 [mg/m3] | Haz-Map | |
| Odor threshold from CHEMINFO | Haz-Map |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Benzothiazole-2-thiol
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Solubility
Solubility at 25 °C (g/100 mL) in alcohol: 2.0; ether 1.0; acetone 10.0; benzene 1.0; carbon tetrachloride <0.2; naphtha <0.5. Moderately soluble in glacial acetic acid. Soluble in alkalies and alkali carbonate solutions
Source: HSDB
05 · Handling and storage
Storing and handling Benzothiazole-2-thiol
Storage conditions
Conditions for safe storage, including any incompatibilities: Keep container tightly closed in a dry and well-ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
... on contact with acid or acid fumes it emits toxic /oxides of sulfur and oxides of nitrogen/.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
2-MERCAPTOBENZOTHIAZOLE is incompatible with strong oxidizing agents. Also incompatible with acids and acid fumes (NTP, 1992).
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Benzothiazole-2-thiol in the storage compatibility matrix →