2-(Methylthio)phenyl isothiocyanate
2-(Methylthio)phenyl isothiocyanate (CAS 51333-75-6) is a specialised organic compound with the linear formula CH3SC6H4NCS and a molecular weight of 181.28 g/mol. As a sulfur-containing thiocyanate, it serves as a valuable building block in organic synthesis. Its primary applications lie in the development of novel chemical entities and research into complex molecular structures.

Organic Synthesis Intermediate
Utilised as a key intermediate in the synthesis of more complex organic molecules. Its isothiocyanate functionality allows for various derivatisation reactions.
Chemical Research
Employed in academic and industrial research laboratories for the exploration of new chemical reactions and the development of novel compounds, particularly those involving sulfur and nitrogen heterocycles.
Building Block
Serves as a versatile building block in the construction of diverse chemical scaffolds. It is particularly useful for introducing the 2-(methylthio)phenyl moiety into target molecules.
| Molecular weight | 181.28 |
|---|---|
| Linear formula | CH3SC6H4NCS |
| Assay | 97% |
| Boiling point | 149-150 °C/10 mmHg(lit.) |
| Density | 1.227 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.695(lit.) |

Hazard statements
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Transport (UN / ADR) | UN 3265 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 34 |
| Safety statements (S) | 26-27-36/37/39-45 |
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-(Methylthio)phenyl isothiocyanate used for?
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2-(Methylthio)phenyl isothiocyanate is primarily used as a building block and intermediate in organic synthesis and chemical research for developing new compounds.
What are the CAS number and formula for 2-(Methylthio)phenyl isothiocyanate?
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The CAS number is 51333-75-6 and the linear formula is CH3SC6H4NCS.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 2-(Methylthio)phenyl isothiocyanate with an assay of 97%. This product is not represented as USP, BP, or EP grade.
How should 2-(Methylthio)phenyl isothiocyanate be handled safely?
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This compound is classified as Dangerous (GHS05, Danger) and causes severe skin burns and eye damage (H314). Handling requires appropriate personal protective equipment including full-face respirators, chemical-resistant gloves, and eye protection. Emergency procedures should be in place as per safety data sheets.
How is 2-(Methylthio)phenyl isothiocyanate packed, shipped, and exported?
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Tech Serve Solutions exports this chemical internationally. Packaging adheres to stringent regulations for hazardous materials (UN 3265 8 / PGII).
How can I request a quote or sample?
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To request a quote or sample, please contact our sales team via the website or direct telephone enquiry, referencing the product name and CAS number.
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