Respiratory Drugs Hormones and the Endocrine System Antipyretic analgesics Antiallergic drugs Antiparasitic drugs Antibiotics Antineoplastic agents Anesthetic Agents Urinary System Drugs Other Chemical drugs Synthetic Anti-infective Drugs Nervous system drugs Fluid, Electrolyte, and Acid-Base Balance Vitamins and Minerals medicines Digestive system drugs Blood System Drugs Circulatory system drugs Diagnostic agents Specialty drugs Drug metabolism Feed Additive Anti-stress drugs Heat-clearing prescription Common vaccine and bacterin Disease-resistant serum Animal Diagnostic Biologicals Drugs Influencing Immune Function Veterinary raw materials Inhibitors
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API

Respiratory Drugs Hormones and the Endocrine System Antipyretic analgesics Antiallergic drugs Antiparasitic drugs Antibiotics Antineoplastic agents Anesthetic Agents Urinary System Drugs Other Chemical drugs Synthetic Anti-infective Drugs Nervous system drugs Fluid, Electrolyte, and Acid-Base Balance Vitamins and Minerals medicines Digestive system drugs Blood System Drugs Circulatory system drugs Diagnostic agents Specialty drugs Drug metabolism Feed Additive Anti-stress drugs Heat-clearing prescription Common vaccine and bacterin Disease-resistant serum Animal Diagnostic Biologicals Drugs Influencing Immune Function Veterinary raw materials Inhibitors
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Active Pharmaceutical Ingredients (API), popularly  speaking, are the raw materials of medicines, only pharmaceutical raw materials are processed into pharmaceutical preparations , can they become medicines available for clinical use, so drugs we usually eat  are  the finished drugs  through processing.

Active Pharmaceutical Ingredients based on its sources can be divided into two major categories ,including  chemical synthetic drugs and natural chemical drugs.

Chemical  synthetic drugs can be divided into organic synthetic drugs and inorganic  synthetic drugs. Inorganic synthetic drugs are inorganic compounds (  very few is element), such as aluminum hydroxide, magnesium trisilicate which are used for the treatment of gastric and duodenal ulcers ; organic synthetic drugs are mainly composed of  drugs made by  basic organic chemical raw materials, through a series of organic chemical reactions  (such as aspirin, chloramphenicol, caffeine, etc.).

Natural chemical drugs ,based on its sources,can be divided into two categories including biochemical drugs and plant chemical drugs. Antibiotics are generally made by the microbial fermentation,  which belongs to the biochemistry category. A variety of semi-synthetic antibiotics occurs in recent years,which are biosynthesis and chemical synthesis combining products.Among active Pharmaceutical Ingredients, the organic synthetic drugs varieties, yields and values have  the largest proportion,which are  the main pillars of the chemical and pharmaceutical industries. The quality of active Pharmaceutical Ingredients  decides whether the formulation is good or bad , so its quality standards are very strict  ,countries in the world have developed national pharmacopoeia standards and strict quality control methods for its widely used active Pharmaceutical ingredients.

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Structure:
Chemical Name:
Phosphoric acid, calcium salt (1:)
CAS:
10103-46-5
MF:
CaH5O4P
Structure:
Chemical Name:
(tert-butyl)[beta-hydroxy-3,4-bis(p-toluoyloxy)phenethyl]ammonium methanesulphonate
CAS:
30392-41-7
MF:
C45H64N2O5S
Structure:
Chemical Name:
FLOSEQUINAN
CAS:
76568-02-0
MF:
C11H10FNO2S
Structure:
Chemical Name:
Sulfamerazine sodium
CAS:
127-58-2
MF:
C11H13N4NaO2S
Structure:
Chemical Name:
ERGOTAMINE TARTRATE
CAS:
379-79-3
MF:
C70H76N10O16
Structure:
Chemical Name:
iMatinib related substance C
CAS:
938082-57-6
MF:
C29H31N7O2
Chemical Name:
SodiuM Nuo Kasu
CAS:
418541-41-0
Structure:
Chemical Name:
17-Hydroxy-19-nor-17alpha-pregna-4,9,11-trien-20-yn-3-one
CAS:
848-21-5
MF:
C20H22O2
Structure:
Chemical Name:
potassium glycerophosphate
CAS:
1319-70-6
MF:
C3H7K2O6P·3H20
Structure:
Chemical Name:
HexanitrodiphenylaMine
CAS:
131-73-7
MF:
C12H5N7O12
Chemical Name:
Penicillin&StreptoMycin solution,γ-Irradiated
Structure:
Chemical Name:
3-Quinolinecarboxylic acid, 1-cyclopropyl-8-ethoxy-6-fluoro-1,4-dihydro-7-(3-Methyl-1-piperazinyl)-4-oxo-
CAS:
182868-72-0
MF:
C20H24FN3O4
Structure:
Chemical Name:
Cefonicid Disodium Salt
CAS:
190181-58-9
MF:
C18H19N6NaO8S3
Structure:
Chemical Name:
Cephradine hydrate
CAS:
31828-50-9
MF:
C16H23N3O6S
Structure:
Chemical Name:
D-AMPHETAMINE SULFATE
CAS:
51-63-8
MF:
C18H28N2O4S
Structure:
Chemical Name:
DIETHYLCARBAMAZINE
CAS:
90-89-1
MF:
C10H21N3O
Structure:
Chemical Name:
Sodium tetraborate pentahydrate
CAS:
12179-04-3
MF:
B4H10Na2O12
Structure:
Chemical Name:
PROPENTOFYLLINE
CAS:
55242-55-2
MF:
C15H22N4O3
Chemical Name:
Penicillin G Sodium salt
Structure:
Chemical Name:
DIOXOPROMETHAZINE HCL
CAS:
13754-56-8
MF:
C17H20N2O2S
Structure:
Chemical Name:
FORMIC ACID, POTASSIUM SALT (2:1)
CAS:
20642-05-1
MF:
CH3KO2
Chemical Name:
vardenafil
Structure:
Chemical Name:
Cephradine monohydrate
CAS:
75975-70-1
MF:
C16H21N3O5S
Chemical Name:
FURBENCILLIN SODIUM
Chemical Name:
Tetracyline Examination Agar
Structure:
Chemical Name:
Antienite
CAS:
5029-05-0
MF:
C9H8N2S2
Structure:
Chemical Name:
Indeloxazine
CAS:
60929-23-9
MF:
C14H17NO2
Structure:
Chemical Name:
Teniloxazine
CAS:
62473-79-4
MF:
C16H19NO2S
Structure:
Chemical Name:
sulfamethazine-n4-acetyl
CAS:
100-90-3
MF:
C14H16N4O3S
Chemical Name:
ENROFLOXACIN SOLUBLE POWDER
Structure:
Chemical Name:
Ciprofloxacin Formamide
MF:
C18H21FN4O4
Structure:
Chemical Name:
calcium bicarbonate
CAS:
3983-19-5
MF:
CH4CaO3
Structure:
Chemical Name:
Dimercaptosuccinic acid
CAS:
2418-14-6
MF:
C4H6O4S2
Structure:
Chemical Name:
(+)-NICOTINE
CAS:
75202-10-7
MF:
C10H14N2
Structure:
Chemical Name:
N-Methyl 3-bromo-4-methylbenzenesulfonamide
CAS:
941294-51-5
MF:
C8H10BrNO2S
Structure:
Chemical Name:
DEXAMETHASONE ACETATE, MONOHYDRATE
CAS:
55812-90-3
MF:
C24H31FO6.H2O
Structure:
Chemical Name:
Fosfomycin calcium
CAS:
26472-47-9
MF:
C3H5O4P.Ca
Structure:
Chemical Name:
DIMINAZENE ACETURATE
CAS:
908-54-3
MF:
C22H29N9O6
Structure:
Chemical Name:
acetyl carbromal
CAS:
77-66-7
MF:
C9H15BrN2O3
Structure:
Chemical Name:
DICROTOPHOS
CAS:
141-66-2
MF:
C8H16NO5P
Structure:
Chemical Name:
Bunazosin hydrochloride
CAS:
52712-76-2
MF:
C19H28ClN5O3
Structure:
Chemical Name:
N-CYCLOHEXYL 3-BROMO-4-METHYLBENZENESULFONAMIDE
CAS:
850429-69-5
MF:
C13H18BrNO2S
Chemical Name:
Enrofloxacin nicotinate
Structure:
Chemical Name:
Cefpimizole
CAS:
84880-03-5
MF:
C28H26N6O10S2
Structure:
Chemical Name:
CHLOROTRIANISENE
CAS:
569-57-3
MF:
C23H21ClO3
Structure:
Chemical Name:
NORETHYNODREL
CAS:
68-23-5
MF:
C20H26O2
Structure:
Chemical Name:
PIPERACILLIN
CAS:
66258-76-2
MF:
C23H29N5O8S
Structure:
Chemical Name:
TOLAZAMIDE
CAS:
1156-19-0
MF:
C14H21N3O3S
Structure:
Chemical Name:
PIVAMPICILLIN
CAS:
33817-20-8
MF:
C22H29N3O6S
Structure:
Chemical Name:
Phenmetrazine
CAS:
134-49-6
MF:
C11H15NO
Structure:
Chemical Name:
DEXCHLORPHENIRAMINE
CAS:
25523-97-1
MF:
C16H19ClN2
Structure:
Chemical Name:
CINAMETIC ACID
CAS:
35703-32-3
MF:
C12H14O5
Structure:
Chemical Name:
(-)-ISOPROTERENOL HYDROCHLORIDE
CAS:
5984-95-2
MF:
C11H18ClNO3
Structure:
Chemical Name:
Selenium sulfide
CAS:
56093-45-9
MF:
H4SSe
Structure:
Chemical Name:
14-DEOXY-11,12-DIDEHYDROANDROGRAPHOLIDE
CAS:
42895-58-9
MF:
C20H28O4
Structure:
Chemical Name:
SODIUM SULFATE
CAS:
15124-09-1
MF:
Na2O4S
Structure:
Chemical Name:
Hydroxychloroquine
CAS:
118-42-3
MF:
C18H26ClN3O
Structure:
Chemical Name:
Dimefline HCL
CAS:
1165-48-6
MF:
C20H21NO3
Structure:
Chemical Name:
bialamicol
CAS:
493-75-4
MF:
C28H40N2O2
Structure:
Chemical Name:
Beclobrate
CAS:
55937-99-0
MF:
C20H23ClO3
Chemical Name:
IVERMECTIN PREMIX
Structure:
Chemical Name:
(R)-Azelastine Hydrochloride
CAS:
153408-28-7
MF:
C22H24ClN3O·HCl
Structure:
Chemical Name:
METARAMINOL
CAS:
54-49-9
MF:
C9H13NO2
Structure:
Chemical Name:
berbine
CAS:
131-10-2
MF:
C17H17N
Chemical Name:
tadalafi
Chemical Name:
ULINASTATIN
Structure:
Chemical Name:
Fludrocortisone
CAS:
127-31-1
MF:
C21H29FO5
Structure:
Chemical Name:
TYROTHRICIN
CAS:
1404-88-2
MF:
C6H13NO5
Structure:
Chemical Name:
Orciprenaline sulfate
CAS:
5874-97-5
MF:
C22H36N2O10S
Structure:
Chemical Name:
Cefazedone
CAS:
56187-47-4
MF:
C18H15Cl2N5O5S3
Structure:
Chemical Name:
Ramiprilat
CAS:
87269-97-4
MF:
C21H28N2O5
Structure:
Chemical Name:
EPOSTANE
CAS:
80471-63-2
MF:
C22H31NO3
Structure:
Chemical Name:
HOMATROPINE
CAS:
87-00-3
MF:
C16H21NO3
Structure:
Chemical Name:
SodiuM DeMethylcantharidate
CAS:
33054-59-0
MF:
C8H11NaO5
Structure:
Chemical Name:
BendaMustine IMpurity C  
CAS:
1313020-25-5
MF:
C19H27Cl2N3O2
Structure:
Chemical Name:
Insulin degludec
CAS:
844439-96-9
MF:
C274H411N65O81S6
Structure:
Chemical Name:
DAUNOMYCINOL
CAS:
28008-55-1
MF:
C27H31NO10
Structure:
Chemical Name:
Ciprofloxacin IMpurity A
MF:
C17H18FN3O3
Structure:
Chemical Name:
Disopyramid phosphate
CAS:
22059-60-5
MF:
C21H32N3O5P
Structure:
Chemical Name:
CHLOROQUINE
CAS:
54-05-7
MF:
C18H26ClN3
Structure:
Chemical Name:
Cimetidine hydrochloride
CAS:
70059-30-2
MF:
C10H17ClN6S
Structure:
Chemical Name:
N-ISOPROPYL 3-BROMO-4-METHYLBENZENESULFONAMIDE
CAS:
850429-66-2
MF:
C10H14BrNO2S
Chemical Name:
Chondroitin 4-sulfate
CAS:
24967-93-9
MF:
(C14H19NO14SNa2)n
Structure:
Chemical Name:
Promazine hydrochloride
CAS:
53-60-1
MF:
C17H21ClN2S
Chemical Name:
COD LIVER OIL
CAS:
8001-69-2
Structure:
Chemical Name:
Loperamide
CAS:
53179-11-6
MF:
C29H33ClN2O2
Structure:
Chemical Name:
Lysergic acid diethylamide
CAS:
50-37-3
MF:
C20H25N3O
Structure:
Chemical Name:
Fosfomycin
CAS:
23155-02-4
MF:
C3H7O4P
Structure:
Chemical Name:
DL-TRIHEXYPHENIDYL HYDROCHLORIDE
CAS:
58947-95-8
MF:
C20H32ClNO
Structure:
Chemical Name:
Zolpidem tartrate
CAS:
99294-93-6
MF:
C23H27N3O7
Structure:
Chemical Name:
THIOCOLCHICOSIDE
CAS:
602-41-5
MF:
C27H33NO10S
Structure:
Chemical Name:
N-(4-CHLOROPHENYL)-N'-(ISOPROPYL)-IMIDODICARBONIMIDIC DIAMIDE
CAS:
500-92-5
MF:
C11H16ClN5
Structure:
Chemical Name:
DIHYDROERGOTAMINE
CAS:
511-12-6
MF:
C33H37N5O5
Structure:
Chemical Name:
(-)-N-METHYLEPHEDRINE
CAS:
552-79-4
MF:
C11H17NO
Structure:
Chemical Name:
ETHCHLORVYNOL CIV (0.7 ML)
CAS:
113-18-8
MF:
C7H9ClO
Structure:
Chemical Name:
Ipodate Sodium
CAS:
1221-56-3
MF:
C12H14I3N2NaO2
Structure:
Chemical Name:
CINCHONINE MONOHYDROCHLORIDE HYDRATE 9&
CAS:
312695-48-0
MF:
C19H27ClN2O3
Chemical Name:
PARAFFIN, LIQUID - REFERENCE SPECTRUM
Structure:
Chemical Name:
NITROUS OXIDE
CAS:
10024-97-2
MF:
N2O
Structure:
Chemical Name:
Benzphetamine
CAS:
156-08-1
MF:
C17H21N