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CAS Registry Number: History, Applications & Science

A CAS Registry Number (also referred to as CAS RN or informally CAS Number) is a unique identification number, assigned by the Chemical Abstracts Service (CAS) in the US to every chemical substance described in the open scientific literature, in order to index the substance in the CAS Registry. This registry includes all substances described since 1957…

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CAS Registry Number topic overview

The analysis highlights History, Applications and Science as prominent areas in the source structure around CAS Registry Number.

Related topics
44
Source areas
5
Connected nodes
49
Extracted relationships
40
Concept neighborhoods
19
Bridge connections
49

What this topic covers Research coverage

Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.

Granularity · 17 topics
Overview · 14 topics
Search engines · 8 topics
History and use · 3 topics
Format · 2 topics

Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.

Explore all related topics Closing gaps

Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.

Overview

History and use

Format

Granularity

Search engines

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

How CAS Registry Number connects Entity context

The extracted context around CAS Registry Number shows recurring relationship patterns in the source. For example, CAS Registry Number → Alteplase, CAS Registry Numbers, CAS RN, CAS RNs, Commonly, Cr, D-epinephrine, Different, DL-epinephrine, EC, Enzyme Commission, For, III, L-epinephrine, Leishman, Occasionally, Recombinant, Some, Stereoisomers, The Another extracted example is CAS Registry Number → Almost, An, CAS Chemical Registry System, CAS Registry Numbers, CAS RN, Chemical Abstracts Service, Historically, One, They, Well-known. Use these groups to spot repeated connection types before inspecting the individual relationships.

CAS Registry Number

Top relations

related to Granularity · 24
CAS Registry Number → Alteplase, CAS Registry Numbers, CAS RN, CAS RNs, Commonly, Cr, D-epinephrine, Different, DL-epinephrine, EC, Enzyme Commission, For, III, L-epinephrine, Leishman, Occasionally, Recombinant, Some, Stereoisomers, The
related to history · 10
CAS Registry Number → Almost, An, CAS Chemical Registry System, CAS Registry Numbers, CAS RN, Chemical Abstracts Service, Historically, One, They, Well-known
related to Format · 5
CAS Registry Number → CAS, CAS Registry, CAS RN, In, This

Important terminology

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

cas registry chemical substance rn information substances number numbers service includes abstracts database unique additional organic inorganic used entries ec

CAS Registry Number relationships Subject–Predicate–Object triples

TTTA extracted 40 structured relationships around CAS Registry Number. Examples in this analysis include 105857-23-6 → instance of → Recombinant protein versions of human TPA have their own CAS RN and CAS Registry Number → related to Format → CAS. The table shows each extracted connection, where it came from and its confidence.

SubjectPredicateObjectConfidenceSrc
105857-23-6instance ofRecombinant protein versions of human TPA have their own CAS RN0.80text
CAS Registry Numberrelated to FormatCAS0.60section
CAS Registry Numberrelated to FormatCAS Registry0.60section
CAS Registry Numberrelated to FormatCAS RN0.60section
CAS Registry Numberrelated to FormatThis0.60section
CAS Registry Numberrelated to FormatIn0.60section
CAS Registry Numberrelated to GranularityThe CAS Registry0.60section
CAS Registry Numberrelated to GranularityThe0.60section
CAS Registry Numberrelated to GranularityStereoisomers0.60section
CAS Registry Numberrelated to GranularityCAS Registry Numbers0.60section
CAS Registry Numberrelated to GranularityL-epinephrine0.60section
CAS Registry Numberrelated to GranularityD-epinephrine0.60section

Related concept clusters Concept neighborhoods

The concept neighborhoods around CAS Registry Number bring nearby vocabulary together. In this analysis, examples include Registry, Rn and Numbers. Use the clusters to find adjacent concepts and terminology that may deserve separate research.

  • CAS Registry Number
    • Registry
    • Rn
    • Numbers
    • Chemical
    • Number
    • Information
    • Tpa
    • Service
    • Available
    • Described
    • Substance
    • Almost
  • cas registry number
    • Registry
    • Rn
    • Chemical
    • Service
    • Numbers
    • Number
    • Chemistry
    • Database
    • Ec
    • Used
    • Information
    • Tpa
  • unique identification number
    • Registry
    • Service
    • Database
    • Ec
    • Used
    • Chemical
    • Substance
    • Described
    • Additional
    • Almost
    • Chemicals
    • Chemistry
  • chemical abstracts service
    • Service
    • Literature
    • Search
    • Chemical
    • Registry
    • Information
    • Substance
    • Number
    • Also
    • Described
    • Additional
    • Assigned
  • chemical substance
    • Service
    • Registry
    • Information
    • Literature
    • Substance
    • Unique
    • Number
    • Chemistry
    • Search
    • Database
    • Includes
    • Substances
  • chemical database
    • Service
    • Registry
    • Information
    • Substances
    • Literature
    • Substance
    • Numbers
    • Number
    • Inorganic
    • Organic
    • Additional
    • Chemicals
  • chemical elements
    • Service
    • Registry
    • Information
    • Literature
    • Substance
    • Number
    • Chemistry
    • Search
    • Database
    • Includes
    • Substances
    • Collection
  • enzyme commission number
    • Registry
    • Service
    • Database
    • Ec
    • Used
    • Chemical
    • Substance
    • Described
    • Additional
    • Almost
    • Chemicals
    • Chemistry

Connections between topic areas Semantic bridges

For CAS Registry Number, one of the stronger structural bridges in this analysis connects CAS Registry Number with Granularity. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.

Min side: 3
CAS Registry NumberGranularity · splits 32 ⟂ 18
CAS Registry NumberOverview · splits 35 ⟂ 15
CAS Registry NumberSearch engines · splits 41 ⟂ 9
CAS Registry NumberHistory and use · splits 46 ⟂ 4
CAS Registry NumberFormat · splits 47 ⟂ 3

Map overview Semantic statistics

CAS Registry Number

Nodes50
Edges49
Triples40
Avg. degree1.96
Density0.04
Components1

Source & methodology

TTTA analyzes the structure around CAS Registry Number to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as History, Applications & Science, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.

Source: Wikipedia — CAS Registry Number · EN edition · Analysis: TopicsToTalkAbout

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