How To Choose A Toilet. Whether you are concerned with saving water or simply wanting to replace an old toilet, we carry the latest models including one-piece toilets, dual flush and water saving toilets. Learn more about the right toilet for you in our buying guide.
The CAS Registry Number is similar to a telephone number and has no significance in terms of the chemical nature or hazards of the material. The CAS Registry Number can be used to locate additional information on the material, for example, when searching in books or chemical data bases.
Check Digit Verification of CAS Registry Numbers A CAS Registry Number Â® includes up to 10 digits which are separated into 3 groups by hyphens. The first part of the number, starting from the left, has 2 to 7 digits; the second part has 2 digits. The final part consists of a single check digit. The check digit is developed by following a standard calculation shown below. Use it to see if you have a valid CAS Registry Number.