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Quality Assurance

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The perfect quality system on basis of ISO 9001:2015 for raw material purchasing, whole production processing, quality control, packing, and warehousing. Hecheng S&T possesses well-equipped analytical lab and chemical analysis lab.




Raw materials:

a) GC purity

b) HPLC purity

c) m.p. ( b.p.)

d) titration analysis



a) IR

b) Loading

c) Appearance

d) Particle size

e) Loss on drying

f) Loss on solvent washing

g) Resin swelling in DCM (or DMF)h) Partical distribution


Fine chemical:

a) IR

b) NMR

c) m.p.(b.p.)

d) HPLC purity




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