How to Search and Buy Chemicals by CAS Number

What is a CAS number?

A CAS registry number is a unique numeric identifier assigned to a specific chemical substance. It is written in three parts separated by hyphens, for example 854107-55-4, and the last digit is a check digit that helps catch typing errors. Because one substance can be known by many names — systematic names, common names, trade names and abbreviations — the CAS number is the most reliable way for a buyer and supplier to be sure they are talking about the same material.

For laboratories, procurement teams and research institutions, quoting the CAS number in every enquiry removes guesswork. It is especially important for impurities, labelled compounds and closely related isomers, where names can differ by only a single letter or number.

Searching the Cadulac Chemicals Ltd catalogue

The online catalogue at Cadulac Chemicals Ltd can be searched by full or partial product name or by CAS number. Typing the CAS number into the search box is usually the fastest route: it returns the exact listing without the noise that a broad name search can produce. Each product has its own page showing the name, CAS number and category, together with related products from the same category.

If a search returns nothing, try removing hyphens or spaces, or search for part of the name instead. Some materials appear under a pharmacopoeial name such as an EP or USP impurity designation, so a partial name search can help you find the listing you need.

Making an enquiry

Once you have found the product, enter the quantity you need in grams or kilograms on the product page and choose WhatsApp or email. Your message is prepared automatically with the product name, CAS number and quantity, so our team can reply with availability, specifications, documentation and a quotation.

Include your intended application, the country of delivery and any documentation you require. Specifications, packaging, lead times and documentation availability are always confirmed upon enquiry rather than assumed.

When a product is not listed

The catalogue lists more than a thousand products, but it cannot cover every substance. If the CAS number you need is not listed, send it to us anyway. Our team can review sourcing options for compounds that are not shown online and respond with what can be offered.