Product Number
Brand
Product Description
Sigma-Aldrich
Phenol, natural, 97%, FG
Supelco
Ascorbic Acid, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
L-Ascorbic acid, FCC, FG
Supelco
Mettler-Toledo Calibration substance ME 51143093, Vanillin, traceable to primary standards (LGC)
Sigma-Aldrich
Quercetin, ≥95% (HPLC), solid
Sigma-Aldrich
Phenol, ≥96.0% (calc. on dry substance, T)
USP
Butylated hydroxytoluene, United States Pharmacopeia (USP) Reference Standard
USP
Ascorbic acid, United States Pharmacopeia (USP) Reference Standard
Supelco
Vanillin melting point standard, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
Methanol solution, NMR reference standard, 4% in methanol-d4 (99.8 atom % D), NMR tube size 3 mm × 8 in.
Supelco
Phenol, Pharmaceutical Secondary Standard; Certified Reference Material
Supelco
Quercetin, Pharmaceutical Secondary Standard; Certified Reference Material
USP
Quercetin, United States Pharmacopeia (USP) Reference Standard
Ascorbic acid, European Pharmacopoeia (EP) Reference Standard
Sigma-Aldrich
Methanol solution, contains 0.50 % (v/v) triethylamine
Supelco
Vanillin, Pharmaceutical Secondary Standard; Certified Reference Material
Vanillin, European Pharmacopoeia (EP) Reference Standard
USP
Phenol, United States Pharmacopeia (USP) Reference Standard
Supelco
Butylated Hydroxytoluene, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
Aluminum chloride, anhydrous, sublimed, ≥98%
Sigma-Aldrich
Aluminum chloride, reagent grade, 98%
Sigma-Aldrich
Aluminum chloride solution, 1.0 M in nitrobenzene
Supelco
L-Ascorbic acid, certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
Supelco
Vanillin, certified reference material, TraceCERT®, Manufactured by: Sigma-Aldrich Production GmbH, Switzerland
Sigma-Aldrich
Aluminum chloride, ReagentPlus®, 99%
Sigma-Aldrich
Phenol, unstabilized, ReagentPlus®, ≥99%
Sigma-Aldrich
Vanillin, ReagentPlus®, 99%
Supelco
Phenol solution, 5000 μg/mL in methanol, certified reference material
USP
Vanillin Melting Point Standard, United States Pharmacopeia (USP) Reference Standard
Supelco
L-Ascorbic acid, analytical standard