(Phenylthio)acetic acid
(Phenylthio)acetic acid (CAS: 103-04-8), with the molecular formula C6H5SCH2COOH and a molar mass of 168.21 g/mol, is a carboxylic acid derivative. It serves as a valuable building block in organic synthesis, particularly in the creation of more complex molecules. This compound is frequently employed in research and development settings within the chemical and pharmaceutical industries due to its versatile reactivity.
- IUPAC
- (Phenylmercapto)acetic acid,S-Phenylthioglycolic acid,Thiophenoxyacetic acid
- Synonyms
- (Phenylmercapto)acetic acidS-Phenylthioglycolic acidThiophenoxyacetic acid

Organic Synthesis Intermediate
Utilised as a precursor in the synthesis of various organic compounds. Its structure allows for diverse chemical transformations, making it a useful intermediate in multi-step synthetic routes.
Pharmaceutical Research
Serves as a building block in the development of new pharmaceutical agents. Its incorporation into molecular structures can contribute to novel therapeutic properties.
Material Science
Investigated for potential applications in material science, where its chemical properties can be exploited to design new materials with specific functionalities.
| Molecular weight | 168.21 |
|---|---|
| Linear formula | C6H5SCH2COOH |
| Assay | 96% |
| Melting point | 60-63 °C(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3335 |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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 (Phenylthio)acetic acid used for?
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(Phenylthio)acetic acid is primarily used as a building block and intermediate in organic synthesis, finding applications in pharmaceutical research and potentially in material science.
What are the CAS number and formula for (Phenylthio)acetic acid?
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The CAS number for (Phenylthio)acetic acid is 103-04-8, and its linear formula is C6H5SCH2COOH.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies (Phenylthio)acetic acid with an assay of 96%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade unless explicitly stated in the product specifications.
How should (Phenylthio)acetic acid be handled?
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(Phenylthio)acetic acid is classified as a warning substance. It causes skin irritation (H315), serious eye irritation (H319), and may cause respiratory irritation (H335). Handle with appropriate personal protective equipment including a dust mask (type N95 US), eyeshields, and gloves. Ensure good ventilation. Store in a well-ventilated place.
Is (Phenylthio)acetic acid shipped internationally?
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Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, and we can ship (Phenylthio)acetic acid to your location worldwide.
How can I request a quote or sample for (Phenylthio)acetic acid?
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To request a quote or a sample of (Phenylthio)acetic acid, please contact our sales team through the website or by phone. Our experts will be happy to assist you.
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