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Certificate of Analysis
Product Name: 1,8-Dihydroxynaphthylene-3,6-disulfonic acid Catalogue Number: GR-67221
Batch Size: 400KG Lot Number: 20230702
CAS Number: 148-25-4 Production Date:
Molecular Formula: C10H8O8S2 Report Date: 2023-07-02
Molecular Weight: 320.3 Expiry Date:
Storage: Room temperature, Protected from light and Sealed


Test Items Specifieation Results
Appearance White to Light yellow to Light orange powder to crystal Conforms
Purity ≥98.0% 99.23%
Insolubles ≤0.3% 0.08%
Water ≤2.0% 0.51%
H-acid ≤1.0% 0.25%
signature
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Date: Date: Date:
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