# ChemSigma

> ChemSigma (凯美西) supplies research chemicals and fine chemical reagents, organized by category. Each reagent page lists identifiers (CAS number, molecular formula and weight), the typical specification where available and pack sizes; a batch Certificate of Analysis is provided with every batch and can be requested with a quotation.

The catalog is organized into 7 categories and 12 sub-categories. Reagent pages use the address /reagent/{CAS number}; product technical profiles add applications, quality documents, storage, transport and frequently asked questions. The same pages are available in Chinese at https://chemsigma.cn.

## Main pages

- [Home](https://chemsigma.com/): research chemicals and reagents, catalog search by CAS number or name
- [Product categories](https://chemsigma.com/Products): all categories and sub-categories
- [Product list](https://chemsigma.com/Products/List): all catalog products with CAS numbers
- [About ChemSigma](https://chemsigma.com/About)
- [Contact](https://chemsigma.com/Contact): email and inquiry details
- [Sitemap](https://chemsigma.com/sitemap.xml): every reagent page, product profile and category page

## Product categories

- [BioChemicals](https://chemsigma.com/category/biochemicals): 2 products in Nucleosides, Nucleotides, Nucleic Acids and Related Reagents
  - [Nucleosides, Nucleotides, Nucleic Acids and Related Reagents](https://chemsigma.com/category/biochemicals/nucleosides-nucleotides-nucleic-acids-and-related-reagents): 2 products
- [Functional Chemical](https://chemsigma.com/category/functional-chemical): 26 products in Personal Care Chemicals, Fluorinated Surfactant and Special Sulfonates
  - [Personal Care Chemicals](https://chemsigma.com/category/functional-chemical/personal-care-chemicals): 1 product
  - [Fluorinated Surfactant](https://chemsigma.com/category/functional-chemical/fluorinated-surfactant): 10 products
  - [Special Sulfonates](https://chemsigma.com/category/functional-chemical/special-sulfonates): 15 products
- [Material Chemicals](https://chemsigma.com/category/material-chemicals): 25 products in Electronic Chemicals
  - [Electronic Chemicals](https://chemsigma.com/category/material-chemicals/electronic-chemicals): 25 products
- [Active Pharmaceutical Ingredients(API) &  Intermediates](https://chemsigma.com/category/active-pharmaceutical-ingredients-api-intermediates): 36 products in API and Intermediates
  - [API](https://chemsigma.com/category/active-pharmaceutical-ingredients-api-intermediates/api): 11 products
  - [Intermediates](https://chemsigma.com/category/active-pharmaceutical-ingredients-api-intermediates/intermediates): 25 products
- [Reference Substance](https://chemsigma.com/category/reference-substance): 1 product in New Compounds (No CasNo)
  - [New Compounds (No CasNo)](https://chemsigma.com/category/reference-substance/new-compounds-no-casno): 1 product
- [Advanced Products](https://chemsigma.com/category/advanced-products): 136 products in VIWIT and TYSChem
  - [VIWIT](https://chemsigma.com/category/advanced-products/viwit): 38 products
  - [TYSChem](https://chemsigma.com/category/advanced-products/tyschem): 98 products
- [No Cas Number](https://chemsigma.com/category/no-cas-number): 34 products in New Compound and Compound Product
  - [New Compound](https://chemsigma.com/category/no-cas-number/new-compound): 32 products
  - [Compound Product](https://chemsigma.com/category/no-cas-number/compound-product): 2 products

## Featured reagents

- [2-Nonanone, 9-bromo-, CAS 52330-02-6](https://chemsigma.com/reagent/52330-02-6)
- [2-CBZ-AMINO-BUT-2-ENOIC ACID METHYL ESTER, CAS 70396-37-1](https://chemsigma.com/reagent/70396-37-1)
- [4-tert-Butyl-1,2-dimercaptobenzene, CAS 117526-80-4](https://chemsigma.com/reagent/117526-80-4)
- [ethylhydrazinoacetate, CAS 637-80-9](https://chemsigma.com/reagent/637-80-9)
- [3(2H)-Isoxazolone,5-(trifluoromethyl)-, CAS 388091-41-6](https://chemsigma.com/reagent/388091-41-6)
- [1-(3-Aminopropyl)-2,8,9-trioxa-5-aza-1-silabicyclo\[3.3.3\]undecane, CAS 17869-27-1](https://chemsigma.com/reagent/17869-27-1)
- [1-(2,6,6-trimethyl-3-cyclohexen-1-yl)ethan-1-one, CAS 25915-53-1](https://chemsigma.com/reagent/25915-53-1)
- [Benzenamine, 4-((4-aminocyclohexyl)methyl)-, CAS 28480-77-5](https://chemsigma.com/reagent/28480-77-5)