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1000ppm浓度溯源于NIST
DL-Thyroxine, %
1-(4-Fluorobenzyl)-1，4-diazepane， 95%
1，2，4，5-四氟苯, 99%，98%+
丙二酸单乙酯钾盐，98%+
Col. 500A dA(bz) 15umol, 1Pk, 89, Single
2,2'-亚甲基双苯并噻唑, ≥97.0%
6-Bromopiperonal, 98% 5GR
Triethanolamine solution 50% in water
3,4-Methylenedioxyacetophenone, 98% 5GR
4-溴-3-甲基苯甲醛,98%+
