Molekula
2-Propanethiol
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
2-Propanethiol is a clear, volatile liquid thiol with a strong, unpleasant odor, primarily used as a malodorant in natural gas, a chemical intermediate, and in analytical chemistry for sulfur detection. It is also employed in flavor and fragrance applications due to its distinctive scent profile. This chemical has a CAS number of 75-33-2, with the molecular formula C3H8S and a molecular weight of 76.16 g/mol. It is stable at ambient storage conditions and carries no signal word for hazard classification. Molekula supplies 2-Propanethiol from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
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100 mL — £31.00 per pack ex VAT · £37.20 inc. VAT
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Specifications
| Property | Value |
|---|---|
| Appearance | Colourless liquid |
| Assay | ≥97.5% |
| Cadmium (Cd) | ≤0.01 ppm |
| Lead (Pb) | ≤0.01 ppm |
| Mercury (Hg) | ≤0.5 ppm |
| Arsenic (As) | ≤0.5 ppm |
| Refractive Index (20ºC) | 1.4240-1.4280 |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | -31 °C |
| Transport Class | 3 |
| Packing Group | II |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless liquid |
| Odour | Extremely unpleasant odor |
| Melting Point | -130.7 °C |
| Boiling Point | 52.5 °C |
| Solubility (other solvents) | Miscible in ethanol, ether; very soluble in acetone; soluble in chloroform |
| Vapour Pressure | 277.3 mmHg at 25 °C |
| Refractive Index | 1.4255 |
| pKa | pKa = 10.86 |
Source: PubChem CID 6364 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 90030309 |
| CAS Number | 75-33-2 |
| IUPAC Name | propane-2-thiol |
| EC Number | 200-861-4 |
| Molecular Formula | C3H8S |
| Molecular Weight | 76.16 |
| Exact Mass | 76.0347 |
| SMILES | CC(C)S |
| InChIKey | KJRCEJOSASVSRA-UHFFFAOYSA-N |
| InChI | InChI=1S/C3H8S/c1-3(2)4/h3-4H,1-2H3 |
| PubChem CID | 6364 |
| UN Number | UN2408 |
| REACH Code | Y110 |
| HTS Code | 3905.99.80.00 |
| Tariff Code | 3905999099 |
Safety & GHS
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Flammable
GHS02
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Health Hazard
GHS07
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Hazardous to the Environment
GHS09
Hazard statements
- H225 Highly flammable liquid and vapour
- H315 Causes skin irritation
- H317 May cause an allergic skin reaction
- H319 Causes serious eye irritation
- H400 Very toxic to aquatic life
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1Methylethanethiol
- 2-Propylthiol
- 2mercaptopropane
- 2Propylmercaptan
- FEMA NO. 3897
- i-propylthiol
- iso-C3H7SH
- ISOPROPYL MERCAPTAN
- Propane-2-thiol
- Propanethiol-(2)
Frequently asked questions
What is 2-Propanethiol (CAS 75-33-2) commonly used for?
2-Propanethiol is primarily used as a **sulfur-containing intermediate** in organic synthesis, as a **odorant in natural gas**, and in the production of **pharmaceuticals, agrochemicals, and flavor/fragrance compounds**.
What is the molecular formula and molecular weight of 2-Propanethiol?
The molecular formula is **C₃H₈S**, and the molecular weight is **76.16 g/mol**.
How should 2-Propanethiol be stored?
Store in a **tightly sealed container** under **ambient conditions**, away from heat, sparks, and open flames, as it is **highly flammable** and emits toxic fumes.
What grades or purities of 2-Propanethiol does Molekula supply?
Molekula supplies **technical grade (98%+ purity)** and **analytical/HPLC grade** 2-Propanethiol, depending on application requirements.
Can Molekula supply 2-Propanethiol in bulk quantities?
Yes, we offer **bulk packaging options** (e.g., 5kg, 25kg drums, or IBCs) for large-scale industrial and research needs—please inquire for specific availability.
What documentation is provided with an order of 2-Propanethiol?
Each order includes a **Certificate of Analysis (CoA)**, **Material Safety Data Sheet (MSDS/SDS)**, and **batch-specific documentation** for traceability and compliance.
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