Buy Chemicals Online By Searching For Their CAS Registry Number

Buy Chemicals Online By Searching For Their CAS Registry Number

If you are using a laptop or desktop computer, you can use the search box in the top right corner of the website to search for chemicals by their name, chemical formula or CAS Registry Number (CASRN, CAS Number, CAS #). Shop for chemicals for sale online here.

If you are searching for chemicals on the website on your phone, tap the search icon that looks like a magnifying glass. If you are not quite sure of what chemical is best suited for your research or other application, please call our customer service department at 512-668-9918 or click here to contact us.

Lab Alley will answer any chemical questions you might have and will help you during the purchasing process to determine the right chemical and quantity that will do the best job. You can order chemicals online or you can purchase chemicals over the phone, whatever you prefer. Browse a list of all the chemicals and lab supplies sold online in the USA at

Common CAS Numbers

Chemical Formulas

A chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs. For example, the chemical formula for Nitric Acid is HNO3. A CAS Registry Number, also referred to as CASRN or CAS Number, is a unique numerical identifier assigned by the Chemical Abstracts Service (CAS) to every chemical substance described in the open scientific literature (currently including all substances described from 1957 through the present, plus some substances from the early or mid 1900s), including organic and inorganic compounds, minerals, isotopes, alloys and nonstructurable materials (UVCBs, substances of unknown or variable composition, complex reaction products, or biological origin).

The registry maintained by CAS is an authoritative collection of disclosed chemical substance information. It currently identifies more than 144 million unique organic and inorganic substances and 67 million protein and DNA sequences, plus additional information about each substance. It is updated with around 15,000 additional new substances daily.

Where Can I Find A CAS Number?

The CAS Registry Number is the universally recognized unique identifier of chemical substances and is often found on packaging and on articles of commerce. To find a CAS Number, click here.

Common Chemistry™ from Chemical Abstracts Service (CAS), a web resource that contains CAS Registry Numbers for approximately 7,900 chemicals of widespread general public interest. Common Chemistry is helpful to non-chemists who know either a name or CAS Registry Number® of a common chemical and want to pair both pieces of information. The CAS Registry Number is the universally recognized unique identifier of chemical substances and is often found on packaging and on articles of commerce. While not a comprehensive CAS Registry Number lookup service, Common Chemistry does provide a way to quickly and easily find names or CAS Registry Numbers for chemicals of general interest.  CAS has collaborated with Wikipedia in developing this resource and encourages you to use the Wikipedia link (when available) or other sources of general information on chemistry, to learn more about these chemicals.

Do Mixtures Have A CAS Number?

Although a single CAS RN (Registry Number) is not normally assigned to an intentional mixture, CAS RNs are provided for the individual components of the mixture. CAS will assign a single CAS RN to a substance regardless of varying physical forms, except for naturally occurring minerals. For example, water, ice, and water vapor are all represented by CAS RN 7732-18-5. CAS will register specific alloys, ions, isotopes, and elementary particles.

CAS REGISTRY | The Gold Standard For Chemical Substance Information

CAS REGISTRY contains more than 157 million unique organic and inorganic chemical substances, such as alloys, coordination compounds, minerals, mixtures, polymers and salts, and more than 68 million sequences - more than any other database of its kind.

When you need to positively identify a chemical substance, you can rely on the authoritative source for chemical names and structures of CAS REGISTRY. You can also identify your substance of interest by its CAS Registry Number®, which is universally used to provide a unique, unmistakable identifier for chemical substances. If your organization uses CAS Registry Numbers to help others locate accurate chemical information, please refer to the CAS RN Verified Partner Program information to ensure appropriate licensing and use.

You can also use CAS REGISTRY to locate the following:

  • literature references to the substance
  • experimental and predicted property data (boiling and melting points, etc.)
  • CA Index Names and synonyms
  • commercial availability
  • preparative methods
  • spectra
  • regulatory information from international sources

You can obtain the information you need for millions of substances from the most current and reliable collection of chemical substance information in the world, CAS REGISTRY.

PubChem CAS Number Search

Quickly find chemical information from authoritative sources at PubChem. See chemical elements arranged in the modern periodic table here. Search chemicals by structure, molecular formula, name and other identifiers here. Get information on chemical safety and toxicity, chemical and physical properties and biological activities here. Browse PubChem data using a classification of interest here. Easily access a chemical substance database, a chemical compound database and a bioassay database here. Learn more about the PubChem substance and compound databases here.

Other CAS Number Lookup Resources

Get access to a free chemical structure database that provides fast access to over 34 million structures, properties and associated information here. Search chemicals by names, chemical structure, systematic names, synonyms, trade names and database identifiers here. Access other comprehensive chemical databases and chemical resources such as ZINC FDA food additives, U.S. National Library Of Medicine National Institutes Of Health resources and a unique bioinformatics and cheminformatics database here. Search chemicals by name, synonym, molecular formula, CAS Registry Number, InChI, InChI Key and/or SMILES here

Browse a list of free Chemical Safety Data Sheets (MSDS/SDS) online that are available in printable PDF format here. Learn more about chemicals substances here. Learn what is a chemical and what is not a chemical here. Learn how many chemicals are in use today here. Learn why "chemical" is not really such as bad word after all, here. Discover the top ten chemicals of major public health concern here. Learn about Responsible Care, the chemical industry's world-class environmental, health, safety and security (EHS&S) performance initiative, here. Get technical information about ACS Reagent Chemicals here. Learn about toxic chemicals here. Learn about chemicals in today's society here. Call 512-746-8862 to talk with a U.S. Chemical Safety Specialist or request more chemical information here.

Information On Chemical Substances From Wikipedia

A chemical substance is a form of matter having constant chemical composition and characteristic properties. Chemical substances can be simple substances, chemical compounds, or alloys. Chemical substances are often called 'pure' to set them apart from mixtures. A common example of a chemical substance is pure water; it has the same properties and the same ratio of hydrogen to oxygen whether it is isolated from a river or made in a laboratory. Other chemical substances commonly encountered in pure form are diamond (carbon), gold, table salt (sodium chloride) and refined sugar (sucrose). However, in practice, no substance is entirely pure, and chemical purity is specified according to the intended use of the chemical. Chemical substances exist as solids, liquids, gases, or plasma, and may change between these phases of matter with changes in temperature or pressure. Chemical substances may be combined or converted to others by means of chemical reactions. Forms of energy, such as light and heat, are not matter, and are thus not "substances" in this regard.

Buy Medical Research Chemicals, Scientific Research Chemicals, Pharmacological Research Chemicals And Agricultural Research Chemicals Online In The USA

If you have questions about your options and choices for ordering research chemicals online here at or if you would like to place an order, call 512-668-9918 or email to talk with a Research Chemical Safety Specialist.

If you can not find the research chemical or ingredient you are looking for, contact us and we may be able to special order it for you., based in Austin, Texas is an online laboratory chemical store and chemical supplier that sells research chemicals to individuals and scientific research organizations in the U.S. Download a laboratory chemicals list here.

Highly specialized research chemicals are sold online in the U.S. at Order high purity research chemicals for pharmaceutical development, innovative medical experiments and biochemical (biochemistry) research. Buy research chemicals for medical research at institutional laboratories or personal use in home science labs. Research chemicals are shipped FedEx in the U.S. Prices for research chemicals start at $5. 

ACS reagent chemicals, 99% pure USP pharmaceutical-grade compounds (PGC) and research chemicals are for sale online here. Pharmaceutical Grade research chemicals ordered online at do not contain unknown substances, dyes, binders, contaminants, fillers or binders.

Use A USA Sales Tax Exemption Certificate To Purchase Scientific Research Chemicals At

Customers based in the United States that do not need to pay sales tax for research chemical orders can email and attach their tax exemption certificate. Download the United States Sales Tax Exemption Form (Form SF1094) here. Download 'Your Practical Guide To Basic Laboratory Techniques' in PDF format here

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