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        Standard substance and standard solution

        Product name Specifications Packing Unit price / yuan
        Standard visa 7-200
        P-methoxybenzoic acid
        Anthracene
        P-nitrobenzoic acid
        Naphthylamine hydrochloric acid standard solution 50ml
        Naphthalene
        Melting point reference material
        Calcium hydroxide PH = 12.40 ± 0.02 25 ° C 500ml
        Oil bromine valence standard liquid 100ml
        Lithium bromide standard solution 50ml
        Cobalt chloride standard solution 500ml
        2.4-Dichloro standard liquid 50ml
        Isobutanol isoamyl alcohol standard solution 5ml
        Isobutanol standard solution 50ml
        Isopropanol-ethanol standard solution 50ml
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