DESIGNATION OF REFRIGERANTS

For a compound derived from a saturated hydrocarbon denoted by the chemical formulaC_mH_nF_pC1_qIn which (n + p + q) = 2m + 2, the complete designation of a refrigerant isR(m − l)(n + 1)(p)
The brominated refrigerants are denoted by putting an additional B and a number to denote as to how many chlorine atoms are replaced by bromine atoms.
In the case of isomers, i.e., compounds with the same chemical formula but different molecular structure, subscrips a, b, etc. are used after the designations.
Unsaturated compounds, for which (n + p + q) = 2m, are distinguished by putting the digit 1 before (m − 1).
For inorganic refrigerants, numerical designations have been given according to then molecular weight added to 700.
In the case of butane, C₄H₁₀ and higher hydrocarbons, arbitrary designation R 600 is used.

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