2-Methyl-1-butanethiol
2-Methyl-1-butanethiol (CAS: 1878-18-8; Formula: C2H5CH(CH3)CH2SH; MW: 104.21) is a sulfur-containing organic compound. It is a clear, colourless liquid noted for its characteristic pungent odour. This thiol is primarily utilised as a building block in chemical synthesis and as a reagent in organic chemistry research. Its properties make it valuable for introducing thiol functionalities into more complex molecules.

Chemical Synthesis Intermediate
2-Methyl-1-butanethiol serves as a versatile intermediate in the synthesis of various organic compounds. It is employed to introduce sulphur-containing groups into molecules, which can be crucial for altering chemical and physical properties.
Organic Building Block
As an organic building block, this thiol is used in the construction of more complex molecular architectures. Its reactive thiol group allows for diverse derivatization pathways in research and development settings.
Laboratory Reagent
In academic and industrial laboratories, 2-Methyl-1-butanethiol functions as a reagent for specific chemical transformations. Its availability supports a range of research applications within organic chemistry.
| Molecular weight | 104.21 |
|---|---|
| Linear formula | C2H5CH(CH3)CH2SH |
| Assay | 95% |
| Boiling point | 116-117 °C(lit.) |
| Density | 0.848 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.447(lit.) |
| Vapour pressure | 41.4 mmHg (37.7 °C) |


Hazard statements
- H225Highly flammable liquid and vapour
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 19 °C / 66.2 °F |
| Transport (UN / ADR) | UN 1111 3 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | F,Xi |
| Risk statements (R) | 11-36/37/38 |
| Safety statements (S) | 16-26-33 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 2-Methyl-1-butanethiol used for?
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2-Methyl-1-butanethiol is primarily used as a building block in chemical synthesis and as a reagent in organic chemistry research. It is valuable for introducing thiol functionalities into molecules.
What are the CAS number and chemical formula for 2-Methyl-1-butanethiol?
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The CAS number for 2-Methyl-1-butanethiol is 1878-18-8, and its chemical formula is C2H5CH(CH3)CH2SH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-Methyl-1-butanethiol with an assay of 95%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade; it is suitable for research and general chemical synthesis purposes.
What are the key safety hazards associated with 2-Methyl-1-butanethiol?
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2-Methyl-1-butanethiol is a highly flammable liquid and vapour (H225). It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Handle with appropriate personal protective equipment in a well-ventilated area.
How is 2-Methyl-1-butanethiol packed and exported?
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2-Methyl-1-butanethiol is typically supplied in quantities suitable for laboratory and industrial use. As a global supplier, Tech Serve Solutions adheres to all relevant shipping regulations for the export of hazardous chemicals, including UN 1111, Hazard Class 3, Packing Group II.
How can I request a quote or sample?
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To request a quote or sample of 2-Methyl-1-butanethiol, please contact our sales team via the website or by phone. Specify the required quantity and your delivery location.
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