Qingdao Sigma Chemical Ltd is is a global chemical industry manufacturers and suppliers of pharmaceuticals and intermediates, peptide,Nootropis etc API, food and feed additives, herbal extracts, agrochemicals and fine chemicals etc.

 

Our Laboratory is located in shandong province. There are 15 experts in our research team. Talented personnel and well-equipped laboratory makes rigorous and professional quality control possible. Lyphar Biotech is equipped with various detection devices, such as HPLC, GC, Spectrophotometer, AAS, Polarimeter, Auto titrators, BOD Incubators, COD Incubators, Melting point apparatus and so on.

 

The aim of QDSIGMA is a quality policy that "Elements in the system all have been satisfied, Personnel has been trained; Every batch of material is checked, Each procedure guarantees the quality; Every bag of our products is top grade, Service is thoughtful all the time, quality and reputation to increase market share and promote enterprise development. The quality, colors and forms of our products have reached a high level in related chemical industry, which relies on characteristic and advanced processing technology and it has gained a high and reliable reputation from customers at both quality and services.

 

QDSIGMA has become the "Top 500 Chinese manufacturing companies","Top 20 of global chemical sales".QDSIGMA has 21 subsidiaries and holding companies.

 

ItemsSpecificationsResultsAppearanceWhite to off-white fine crystalline powder.ConformsSolubilityVery slightly soluble in water; slightly soluble in alcohol, in chloroform, in ethyl acetate, and in methylene chloride; sparingly soluble in methanol.ConformsIdentificationA. IR spectrum exhibits maxima only at the same wavelengths as that of the reference standard.Confomrs B. The retention time of the major peak in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay.ConformsSpecific Optical RotationBetween -110° and -118°-114°WaterNot more than 6.0%0.41%Residue on IgnitionNot more than 0.1%0.02%Heavy metalsNot more than 0.002%<0.002%Related substances (HPLC)Lignan P: Not more than 0.5%<0.05% Picroetoposide: Not more than 1.0%.<0.0021% Total related compounds: Not more than 2.0%1.40%Residual SolventEthanol: Not more than 5000ppm24ppm Chloroform: Not more than 60ppmNot detectedAssay(HPLC)95.0% to 105.0% of C29H32O13 on the anhydrous basis.98.50%Packaging and StoragePreserve in tight, light-resistant containers.Conclusion: The test results indicate the product complies with the specifications