What is the CAS Number and how can it be used to search for information about a chemical compound?

What is the CAS Number and how can it be used to search for information about a chemical compound?

CAS Numbers are up to 10 digits long using the format xxxxxxx-yy-z. They are assigned to a compound as the CAS registers a new compound. The number has no significance to the chemistry, structure, or chemical nature of the molecule. The CAS Number of a compound is a useful way to identify a chemical over its name.

What does a CAS Number tell you?

A CAS (Chemical Abstracts Service) Registry Number is a unique identifier that tells you, for example, that acetone and dimethyl ketone are actually the same substance. As of 2020, there were 159,000,000 unique chemical substances indexed by CAS as well as 68,000,000 protein and nucleic acid sequences.

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How do I verify a CAS Number?

CAS Numbers are always constructed from right to left, where the check digit (Z) is used to confirm the validity and uniqueness of the identifier. It is found by taking the first digit times 1, the second times 2, etc. and then taking the modulo 10 of the summation.

Is CAS Number confidential?

Customer identity information will be kept confidential. If you wish to maintain confidentiality for your substance’s identity, you should request only a CA Index Name and not a new CAS Registry Number.

WHO issues CAS number?

A Confirmation of Acceptance for Studies (CAS) number is a unique 14 digit reference given to you by UCL (your sponsor). UKVI will use this number to confirm that you are a genuine student. They do this by using it to access your CAS record on their secure database.

How do I find my CAS number UK?

Your CAS Application Information will be available in the CAS Application task within the Pre-Registration system. The information is a summary of your personal information, your course details and your qualifications – information that you will use when applying for your visa.

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What is CAS compound name?


PubChem CID 10197613
Molecular Formula CaS
Synonyms Calcium;sulfide CHEBI:81055 DTXSID30885140 DB11211 C17392
Molecular Weight 72.15
Component Compounds CID 29109 (Sulfide) CID 5460341 (Calcium)

Who is responsible for filling out the TSCA form?

The Principal Investigator, Lab Manager or Researcher must fill out the TSCA Import Certification Form which will accompany the purchase order that lists the chemical names. This form must be available to the carrier and customs officer at the time of import.

How may chemical companies protect their trade secrets despite requirements to furnish SDSs?

Companies who are concerned about disclosing the full composition of a mixture in safety data sheets (SDSs) or on product labels can request the use of an alternative chemical name for a hazardous substance to protect their trade secrets. The request must be submitted to European Chemicals Agency (ECHA).

WHO issued CAS letter?

A CAS (Confirmation of Acceptance for Studies) letter is an electronic document issued by the university in support of your application for a student visa. The CAS letter is typically issued after you have accepted an offer and paid the required deposit to secure your place.

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Can CAS be rejected?

1.5 The University may refuse to issue a CAS if it is considered likely that the student’s visa application will be refused.

How do I get CAS letter UK?

Visit the UK visa immigration services website and complete the tier-4 application process by filling all the important details including your CAS number correctly. Pay the fees for the immigration health insurance and application fee.