1,2-Benzisothiazol-3(2H)-one
1,2-Benzisothiazol-3(2H)-one (CAS 2634-33-5), a heterocyclic compound with the molecular formula C7H5NOS and a molecular weight of 151.19 g/mol, serves as a valuable building block in chemical synthesis. Its structure lends itself to the creation of more complex molecules. Tech Serve Solutions offers this compound at a minimum assay of 97%, suitable for research and development purposes, contributing to advancements in various chemical fields.
- Synonyms
- 2-Benzisothiazolin-3-oneBIT1,2-Benzisothiazolin-3-one

Chemical Synthesis Intermediate
Utilised as a foundational component in the synthesis of diverse organic compounds. Its reactive sites allow for the introduction of specific functional groups, enabling the construction of complex molecular architectures for research.
Heterocyclic Chemistry Research
A key reagent in the study and development of novel heterocyclic compounds. This molecule's benzisothiazole core is of interest in medicinal chemistry and materials science research for its unique structural properties.
Building Block for Specialty Chemicals
Functions as a versatile building block in the creation of specialty chemicals. Its incorporation into larger molecules can impart specific characteristics, finding potential use in the development of new materials or functional agents.
| Molecular weight | 151.19 |
|---|---|
| Empirical formula | C7H5NOS |
| Assay | 97% |
| Melting point | 154-158 °C(lit.) |



Hazard statements
- H302Harmful if swallowed
- H315Causes skin irritation
- H317May cause an allergic skin reaction
- H318Causes serious eye damage
- H400Very toxic to aquatic life
Precautionary statements
- P273Avoid release to the environment
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 2 |
| Hazard codes (EU) | Xn,N |
| Risk statements (R) | 22-38-41-43-50 |
| Safety statements (S) | 24-26-37/39-61 |
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 1,2-Benzisothiazol-3(2H)-one used for?
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1,2-Benzisothiazol-3(2H)-one is primarily used as a building block in chemical synthesis and in heterocyclic chemistry research for the development of new organic compounds and specialty chemicals.
What is the CAS number and molecular formula for 1,2-Benzisothiazol-3(2H)-one?
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The CAS number for 1,2-Benzisothiazol-3(2H)-one is 2634-33-5, and its molecular formula is C7H5NOS.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 1,2-Benzisothiazol-3(2H)-one with a minimum assay of 97%. This product is intended for research and chemical synthesis; TSS does not represent it as USP, BP, EP, or any other pharmacopoeia grade.
What are the primary safety considerations when handling 1,2-Benzisothiazol-3(2H)-one?
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1,2-Benzisothiazol-3(2H)-one is classified as Danger, with hazards including H302 (Harmful if swallowed), H315 (Causes skin irritation), H317 (May cause an allergic skin reaction), H318 (Causes serious eye damage), and H400 (Very toxic to aquatic life). Always use appropriate personal protective equipment such as eyeshields, gloves, and a dust mask, and handle in a well-ventilated area. Avoid release to the environment.
How is 1,2-Benzisothiazol-3(2H)-one typically packed and shipped?
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1,2-Benzisothiazol-3(2H)-one is carefully packaged to ensure safe transit and is available for export globally. Shipping classifications are in accordance with UN 3077, 9 / PGIII.
How can I request a quote or sample for 1,2-Benzisothiazol-3(2H)-one?
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To request a quote or a sample, please contact our sales team through the website or by direct inquiry, providing your specific requirements and shipping details.
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