A defensible SDS records not only the result, but also the formula version, source data, thresholds, calculations and uncertainties behind it.

Evidence record

• Formula and concentration ranges.
• Ingredient classifications and authoritative sources.
• Applicable limits, additivity formulas or bridging justification.
• Data gaps, assumptions, reviewer and revision date.

Consistency gate

Compare the classification record with Sections 2, 3, 9, 11, 12 and 14 and with the final GHS label.