# ISO 21561-2:2016 — Withdrawn and superseded ISO standards

For ISO 21561-2:2016, item title is Styrene-butadiene rubber (SBR) — Determination of the microstructure of solution-polymerized SBR — Part 2: FTIR with ATR method; status code is 9599; successor is ISO 21561-2:2024; withdrawn / published date is 2016-03-08, recorded from its source on 2026-08-05.

- **Identifier:** ISO 21561-2:2016 _(verified: appears in the quote below)_
- **Item title:** Styrene-butadiene rubber (SBR) — Determination of the microstructure of solution-polymerized SBR — Part 2: FTIR with ATR method _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 21561-2:2024
- **Withdrawn / published date:** 2016-03-08 _(verified: appears in the quote below)_

## What the source says

> 64125,IS,,ISO 21561-2:2016,Styrene-butadiene rubber (SBR) — Determination of the microstructure of solution-polymerized SBR — Part 2: FTIR with ATR method,Caoutchouc styrène-butadiène (SBR) — Détermination de la microstructure du SBR polymérisé en solution — Partie 2: Méthode FTIR avec ATR,2016-03-08,1,['83.060'],ISO/TC 45/SC 3,9599,"[53038,40322]",[85552],['en'],16,"<p>ISO 21561-2:2016 specifies procedures for the quantitative determination of the microstructure of the butadiene and the content of styrene in solution-polymerized SBR (S-SBR) by Fourier Transform Infrared Spectrometry (FTIR) with Attenuated Total Reflection (ATR) method. The styrene content is expressed in mass % relative to

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).