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Hach Company Eriochrome Black T, 25 g
Supplier: Hach Company 13224
[1-(1-Hydroxy-2-naphthylazo)-6-nitro-2-naphthol-4-sulfonic acid, sodium salt] Practical Grade, CAS No. 1787-61-7 C20H12O7N3SNa, FW = 461.40.
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