Testing

Perfluorohexane sulfonic

acid (PFHxS), its salts and

PFHxS-related compounds 

Perfluorohexane sulfonic

acid (PFHxS), its salts and PFHxS-related compounds

means the following:

(i) Perfluorohexane sulfonic acid, including any of its branched isomers;

(ii) its salts;

(iii) any substance that contains the chemical moiety C6F13SO2- as one of its structural elements and that potentially degrades to PFHxS.

355-46-4 and others

206-587-1 and others

1. Where the sum of the concentrations of

PFHxS and any of its salts present in a substance, mixture or article is equal to or below 0.025 mg/kg (0.0000025% by weight);

2. Where the sum of the concentrations of

any PFHxS-related compounds present in a substance, mixture or article is equal to or below 1 mg/kg (0.0001% by weight);

3. Where the sum of the concentrations of

PFHxS, any of its salts, and any PFHxS-related compounds present in concentrated firefighting foam mixtures that are to be used or are used in the production of other fire-fighting foam mixtures is equal to or below 0.1 mg/kg (0.00001% by weight).