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Cato Research Chemicals Inc.??? ?? ??? ?????.

?? ?:Cato Research Chemicals Inc.
??:020-81960175
???:tianwen.zhan@cato-chem.com
??:China
URL: www.cato-chem.com/
? ?? ?:7734
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Travoprost Impurity 56?????????105-36-2C4H7BrO2
Zidovudine Impurity 15??????????596-31-6C20H18O
Trimetazidine EP Impurity G????110-85-0C4H10N2
Dequalinium Chloride?????????522-51-0C30H40Cl2N4
Ethyl thioglycolate???????????623-51-8C4H8O2S
Bortezomib Impurity 422,3-?????????89-01-0C6H4N2O4
Tenofovir disoproxil Impurity 40(Azathioprine EP Impurity F)??????68-94-0C5H4N4O
Tenofovir disoproxil Impurity 87???73-24-5C5H5N5
Tenofovir disoproxil Impurity 88?? P-????????80-40-0C9H12O3S
Racecadotril Impurity 15?? P-??? ?????80-48-8C8H10O3S
Olaparib Impurity 23??????????75-26-3C3H7Br
Potassium Clavulanate EP Impurity H3?-????75-64-9C4H11N
Pentafluorophenol????????771-61-9C6HF5O
Glycopyrronium Bromide EP Impurity O5-???????? ?618-88-2C8H5NO6
Letrozole Impurity 38874-86-2C8H6ClN
Betahistine EP Impurity A2-?????100-69-6C7H7N
Phenytoin Impurity 7????119-61-9C13H10O
Thiamine Nitrate EP Impurity D490-82-4C12H16N4O2S
Pyridoxine EP Impurity B148-51-6C8H12ClNO2
Salicylic acid Impurity 12546-74-7C2H7NaO4S
Dopamine Impurity 32DL-??????138-65-8C8H11NO3
Dehydroepiandrosterone Sulfate10,13-???-17-??-3-????-1,2,3,4,7,8,9,11,12,14,15,16-???????????[a]????651-48-9C19H28O5S
Tetracaine EP Impurity A4-??????150-13-0C7H7NO2
Urapidil Impurity 61,3-?????????769-42-6C6H8N2O3
2-Bromobutane2-?????78-76-2C4H9Br
Piperazine Impurity 24N,N'-?????????140-79-4C4H8N4O2
Furfural Impurity 3??(5-)-2-???620-02-0C6H6O2
Indocyanine Green Impurity 101-???-3-???????109-70-6C3H6BrCl
2,3-Dichloro-1-propanol????(2,3-)-1-????616-23-9C3H6Cl2O
Glyoxylic Acid (ca. 50% in Water, ca. 9mol/L)?????298-12-4C2H2O3
5Alpha-Cholestane481-21-0C27H48
Metoclopramide????????364-62-5C14H22ClN3O2
Piroxicam EP Impurity A2-??????504-29-0C5H6N2
Tiotropium EP Impurity F704-38-1C9H6OS2
Verapamil Hydrochloride???? ?????????152-11-4C27H39ClN2O4
Verapamil EP Impurity G3,4-??????????120-14-9C9H10O3
Ascorbic Acid EP Impurity E???144-62-7C2H2O4
Ascorbic Acid EP Impurity CL-??-??-2-?????526-98-7C6H10O7
L-Dehydro Ascorbic Acid490-83-5C6H6O6
Glycopyrronium Bromide EP Impurity B????? ?611-73-4C8H6O3
4-Hydroxybenzenesulfonic Acidp-?????98-67-9C6H6O4S
Oxiracetam Impurity 12??2,4-????-3-???????88-00-6C6H8Cl2O3
Vortioxetine Impurity 11-??????92-54-6C10H14N2
Imatinib Impurity 61???????????62-50-0C3H8O3S
H-D-Arg-OH157-06-2C6H14N4O2
Glycylglycine??????556-50-3C4H8N2O3
Iminodiacetic Acid??? ???142-73-4C4H7NO4
Benzyldimethyldodecylammonium Chloride??????139-07-1C21H38ClN
p-Toluenesulfonyl Chloride??-?????? ???98-59-9C7H7ClO2S
2,4-Dichlorobenzyl chloride2,4-???????????94-99-5C7H5Cl3
L-Homoserine672-15-1C4H9NO3
Valproic Acid USP Related Compound A2-??-4-?????99-67-2C8H12O2
Sodium Valproate EP Impurity L2-?????97-61-0C6H12O2
Norepinephrine Impurity 56?????329-65-7C9H13NO3
Propranolol hydrochloride???? ?????????318-98-9C16H22ClNO2
Tropic acid4'-????-2,4-????????529-64-6C9H10O3
Clavulanic acid Impurity 153-??-2-???565-61-7C6H12O
Progesterone Impurity 156-???????????604-20-6C21H30O3
Sulfadimethoxine EP Impurity D????121-57-3C6H7NO3S
Levonorgestrel EP Impurity K18-??????793-55-5C19H28O2
Phenylhydrazine Hydrochloride??????? ?????59-88-1C6H9ClN2
Dichloroacetic Acid????????79-43-6C2H2Cl2O2
1,4,5,8-TETRAHYDROXYANTHRAQUINONE1,4,5,8-?????????????81-60-7C14H8O6
N,N-DiethylanilineN,N-??????91-66-7C10H15N
3,6-Dimethyl-1,4-dioxane-2,5-dioneDL-???95-96-5C6H8O4
Chloroethane (Tetrahydrofuran Solution)????75-00-3C2H5Cl
4-tert-Amylphenol4-??????80-46-6C11H16O
Dichloroacetyl Chloride???????? ???79-36-7C2HCl3O
Methyl Chloroacetate???????????96-34-4C3H5ClO2
Xylitol????87-99-0C5H12O5
2-Acetylthiophene88-15-3C6H6OS
Thiamine Pyrophosphate Chloride??????????154-87-0C12H19ClN4O7P2S
Ursodeoxycholic acid????????128-13-2C24H40O4
Trimethylamine Hydrochloride?????? ?????????593-81-7C3H10ClN
1,1,1,3,3,3-Hexamethyldisilazane?????????999-97-3C6H19NSi2
3-Chlorobenzaldehyde3-?????????587-04-2C7H5ClO
2-Methyl-2,4-Pentanediol??????107-41-5C6H14O2
Tolvaptan Impurity 21??-????118-90-1C8H8O2
Cefmetazole Impurity 20 (Chloroacetonitrile)?????????107-14-2C2H2ClN
Nicotine EP Impurity E (Mixture of Diastereomers)?????1????491-26-9C10H14N2O
Androstenediol521-17-5C19H30O2
Dapagliflozin Impurity 105??????? ???????107-98-2C4H10O2
2-Methylbutyric Acid2-?????116-53-0C5H10O2
Butyraldehyden-??????123-72-8C4H8O
Ceftriaxone Impurity 39?????????????, ???? ?139-33-3C10H14N2Na2O8
Linolenic acid Methyl Ester301-00-8C19H32O2
H-Gly-Gly-Gly-OH???????-44556-33-2C6H11N3O4
Glucosamine sulfate Impurity 14290-37-9C4H4N2
Glucosamine sulfate Impurity 15?????109-08-0C5H6N2
Prostaglandin E1745-65-3C20H34O5
Tolperisone Impurity 1?????492-38-6C9H8O2
Trihexyphenidyl EP Impurity A HCl1-(2-?????)??????????886-06-6C14H20ClNO
Vitamin K1 Impurity 52-????-3-??-1,4-?????483-55-6C11H8O3
Phloroglucinol Impurity 12137-19-9C6H4Cl2O2
Phloroglucinol Impurity 171,2,4-?????533-73-3C6H6O3
Phloroglucinol Impurity 18????????491-45-2C12H10O5
Phloroglucinol Impurity 28500-99-2C8H10O3
Pirfenidone Impurity 33?????108-86-1C6H5Br
Cyclophosphamide Impurity 10821-48-7C4H10Cl3N
Cyclophosphamide Impurity 113-???????156-87-6C3H9NO
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