Chemicals can be expressed in different ways:
In addition, chemicals can be named differently according to different chemical naming schemes.
The American Chemical Society (ACS) has assigned a unique number or CAS number to the chemical to avoid this confusion. To date, about 32 million species of organic and inorganic chemicals have been assigned a CAS number, which is constantly being updated.
In particular, where new chemicals are manufactured, importers or exporters often require a CAS number for the substance.
This is because the CAS number is a identification number for the substance and is therefore a reliable international standard for identification of chemical identity.
After identifying the structure and properties of the material, Chemtopia provides CAS number registration service through its connection with CAS in the U.S.