What is the CAS number of textile chemicals?
CAS number (CAS Registry Number or CAS Number, CAS Rn, CAS #), also known as CAS registration number, is a certain substance (clothing additive, compound, polymer material, biological sequence (Biological sequence), mixture or alloy) unique numerical identification number.
The American Chemical Abstracts Service (CAS) formulates registration numbers for chemical substances. This number is an important tool for retrieving information on chemical substances with multiple names. It is an 8-unique numeric identification number for a certain substance (compound, polymer material, biological sequence), mixture or alloy.
CAS, a subsidiary organization of the American Chemical Society, is responsible for assigning a CAS number to every substance that appears in the literature. Its purpose is to avoid the trouble of multiple names for chemical substances and make database retrieval more convenient. Nowadays, almost all chemical databases agree to search by CAS number. As of December 25, 2005, CAS had registered new data on 27,115,156 substances, with more than 4,000 new substances added every day.
Sometimes it is difficult to locate the precise substance just by the name of the substance, so a CAS code is required. The CAS code is equivalent to a person’s ID card. However, the CAS code is not unique. There may be two CAS codes for the same substance or the same CAS code for two substances, but its accuracy is also greater than the name of the substance. Moreover, the names of substances, especially the names of some organic substances, can be very long and difficult to remember, write and transmit data. CAS codes do not have this problem and the CAS codes themselves also contain error correction mechanisms, just like the barcodes in supermarkets.
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