SH/T 1851-2026Isoprene for industrial use-Determination of p-tert-butyl-catechol (TBC) - Gas chromatographic method (English PDF)

SH/T 1851-2026 is the English-translated version of 工业用异戊二烯中特丁基邻苯二酚（TBC）含量的测定 气相色谱法.

SH/T 1851-2026 describes a gas chromatographic method for determining the content of p-tert-butyl-catechol (TBC) in isoprene for industrial use. TBC is the stabilizer commonly added to isoprene, so the method serves to check how much of it a given lot contains.

The standard is intended for isoprene producers, chemical plants that buy isoprene, and testing laboratories that carry out quality control analysis. It is a voluntary standard, as shown by the /T in its code. It was approved by the Ministry of Industry and Information Technology, issued on 16 April 2026 and takes effect on 1 November 2026. It is a new standard.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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