•SEPA
Classification No.: 2130 .1
/Approval Date: 6/26/87
Addressee
EPA ORDER - CHEMICAL ABSTRACT SERVICE REGISTRY
NUMBER DATA STANDARD
1. .PURPOSE: This Transmittal issues EPA Order 21SO.L -
Chemical Abstract Service Registry Number Data Standard..
2. EXPLANATION: EPA 2180.1 - Chemical Abstract Service
Registry Number Data Standard has been reissued to expand
the roles of the Procurement and Contracts Management
Division and the Grants Administration Division.
3. FILING INSTRUCTIONS: File the attached Order in a three-
ring binder established for the EPA Directives System.
Kathy Petruccelli, Director
Management and Organization Division
Originator " " " " —'—~ •———
e?AFormms-i2is-a^nformatiori Manageaeat and Services Division/Office of
Information Resources Management
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oEPA
Classification No.: 2180.1
Approval Date: 6/26/87
CHEMICAL ABSTRACT SERVICE REGISTRY NUMBER DATA STANDARD
1. PURPOSE. This Order establishes the policy and responsibilitie:
related to the use of registry data, specifically the Registry
Number, from the Chemical Abstracts Service (CAS) Division
of the American Chemical Society in automated information
systems containing data/information on specific, definable
chemical substances. The CAS registry number provides
consistent and unambiguous identification of chemicals and
facilitates sharing chemical information across programmatic
media.
2. SCOPE AND APPLICABILITY. This data standard applies to all
EPA organizations and their employees as well as the facili-
ties and personnel of agents of EPA who design, develop,
operate or maintain Agency information and information systems
having to do with specific, definable chemical substances.
It also applies to EPA contractors and assistance recipients.
3. REFERENCE.
Chapter 5 of the EPA IRM Policy Manual sets forth the general
principles on data standards within the Agency. This Order
relates to one of several data standards used by EPA.
I. BACKGROUND.
a. Information technology makes efficient sharing of data
among automated systems feasible, provided there exist
comiT.cn definitions for data elements among the systems.
b. The CAS Registry Number is accepted nationally and
internationally as an identifier for specific, definable
chemical substances.
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EPA ORDER - - - •> 2180.1
6/26/87
c. Agency programs need access to information about chemicals
from other programs, agencies, States and local govern-
ments. There is a need for a chemical identification
data element standard to facilitate access to chemical
information.
5. POLICY.
a. Any computer-based Agency system currently in use or
being planned containing data/information on specific
definable chemical substances shall contain the current
CAS registry number for each chemical substance.
b. Additional data selected from the CAS chemical registry
system, such as CA Index Names and Synonyms, Molecular
Formulas and the CAS Chemical Registry Records, are
optional.
6. RESPONSIBILITIES.
a. The Office of Information Resources Management (OIRM)
shall:
(1) Provide effective leadership in developing,
promulgating and enforcing this data standard.
(2) Provide guidance and technical assistance in
implementing the requirements of this data standard.
b. Assistant Administrators, Associate Administrators,
Regional Administrators, Laboratory Directors, Headquarters
Staff Office Directors, the General Counsel, the Inspector
General and Senior IRM Officials shall establish procedures
within their respective organizations to ensure compliance
with the requirements of this data standard.
c. The Procurement and Contracts Management Division and the
Grants Administration Division shall establish procedures
to ensure that contractors and assistance recipients are
in compliance with the requirements of this data standard.
7. DEFINITIONS.
a. "CAS Reg-istry Number" refers to a unique, identifying
number assigned by CAS to each distinct -chemical substance
recorded- in the CAS Chemical Registry System.
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EPA ORDER 2180.1
6/26/87
b. "CA Index Names and Synonyms" refers to the names recorded
in the CAS Chemical Registry System for each registered
substance. These names include the CA Index Names and
associated commercial names/ author-designated names,
acronyms, etc.
c. "Molecular Formula" refers to the formula which lists the
kin'! and number of atoms in a molecule.
d. "CAS Unique Chemical Registry Record" refers to the
machine record that represents the chemical structure in
the CAS Chemical Regis-try System. The fundamental
component is the connection table which is a detailed
inventory of the atoms and bonds that comprise the two-
dimensional representation of the substance's structure.
Additional components of the structure record include
the description of such items as stereochemistry, abnormal
mass values and charges.
-8. PROCEDURES.
The Information and Management Services Division of OIRM
will provide any additional technical guidance for -implementing
the requirements of this data standard.
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