ASTM D6126/D6126M-21

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of the standard as published by ASTM is to be considered the official document.
Designation: D6126/D6126M − 11 (Reapproved 2015) D6126/D6126M − 21
Standard Specification for
HFC-23 (Trifluoromethane, CHF )
This standard is issued under the fixed designation D6126/D6126M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers the requirements for HFC-23 as a fire fighting medium.
1.2 This specification does not address the fire fighting equipment or hardware that employs HFC-23 or the conditions of
employing such equipment (for example: handshields, fixed installations, etc.).
1.3 This specification does not address the storage or transportation of HFC-23 Storage handling, and transportation issues are
addressed in Practice D6127.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used
independently of the other, and values from the two systems shall not be combined.
1.5 The following safety hazards caveat pertains to the test methods portion, Section 6, of this specification:This standard does
not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard
to establish appropriate safety safety, health, and healthenvironmental practices and determine the applicability of regulatory
limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D6127 Practice for Handling, Transportation, and Storage of HFC-23 (Trifluoromethane, CHF )
D6806 Practice for Analysis of Halogenated Organic Solvents and Their Admixtures by Gas Chromatography
2.2 ISO U.S. Government Standards:
ISO 342749 CFR Part 172 Gaseous Halogenated Hydrocarbons (Liquefied Gases) - Taking a SampleHazardous Materials Table,
Special Provisions, Hazardous Materials Communications, Emergency Response Information, Training Requirements, and
Security Plans
49 CFR Part 172.101 Purpose and Use of Hazardous Materials Table
This specification is under the jurisdiction of ASTM Committee D26 on Halogenated Organic Solvents and Fire Extinguishing Agents and is the direct responsibility
of Subcommittee D26.09 on Fire Extinguishing Agents.
Current edition approved June 1, 2015June 1, 2021. Published June 2015June 2021. Originally approved in 1997. Last previous edition approved in 20112015 as
ϵ1
D6126/D6126M-11 . (2015). DOI: 10.1520/D6126_D6126M-11R15.10.1520/D6126_D6126M-21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
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D6126/D6126M − 21
2.3 AHRI Standards:Standard:
2008 Appendix C for Analytical Procedures for ARIAHRI Standard 700-2006700-2014
2.4 U.S. Government Standards:
Code of Federal Regulations (CFR) Title 49, Part 172.101 Tables of Hazardous Materials and Special Provisions
Code of Federal Regulations (CFR) Title 49, Part 172 Sub D Marking Requirements of Packaging for Transportation
2.4 American Society of Refrigerating EngineersASHRAE Standard::
ASREASHRAE Standard 34,34 Designation and Safety Classification of Refrigerants
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 halogenated hydrocarbon—hydrocarbon, n—thethe halogenated compound coding terminology system provides a conve-
nient means to reference halogenated hydrocarbons (see ASHRAE Standard 34). Halogenated hydrocarbons are saturated
hydrocarbons in which one or more of the hydrogen atoms have been replaced by atoms of the halogen series (fluorine, chlorine,
bromine, and iodine). It is convention to prefix the number with an abbreviation of the compound:
CFC = chlorofluorocarbon
HCFC = hydrochlorofluorocarbon
HFC = hydrofluorocarbon
FC = fluorocarbon
R = refrigerant
halogenated compound coding terminology system provides a convenient means to reference halogenated hydrocarbons, ASRE 34.
Halogenated hydrocarbons are saturated hydrocarbons in which one or more of the hydrogen atoms have been replaced by atoms
of the halogen series (fluorine, chlorine, bromine, and iodine). It is convention to prefix the number with an abbreviation of the
compound:
CFC = chlorofluorocarbon
HCFC = hydrochlorofluorocarbon
HFC = hydrofluorocarbon
FC = fluorocarbon
R = refrigerant
3.1.1.1 Discussion—
By definitions, the right most digit of the numbering system is the number of fluorine atoms.
3.1.1.2 Discussion—
The second digit from the right is the number of hydrogen atoms plus one (+1).
3.1.1.3 Discussion—
The third digit from the right is one less (-1)(–1) than number of carbon atoms in the compound (when this number is zero (0)
it is omitted from the number.
3.1.1.4 Discussion—
Unaccounted for valance requirements are assumed to be chlorine atoms.
3.1.1.5 Discussion—
When the compound contains bromine or iodine, the same rules apply except the letter “B” for bromine or “I” for iodine follows
the parent compound designated number and the number of the atoms is placed after the letter.
3.1.1.6 Discussion—
Example—CHF = R-23 = HFC-23.
3.1.2 HFC-23—HFC-23, n—the compound trifluoromethane; CHF .
4. Material Requirements
4.1 Nitrogen (N ) partial pressure is not required for this product, it is shipped neat. The saturated vapor pressure of HFC-23 is
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