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Home > Active Pharmaceutical Ingredients
In the chemical industry, API is Active Pharmaceutical Ingredients, meaning the active ingredients in pharmaceutical products. It is the core substance for producing the intended therapeutic effect. The quality of Active Pharmaceutical Ingredients is critical to the safety and efficacy of the final pharmaceutical product. Therefore, the production of API chemicals involves strict regulatory guidelines and standards, such as GMP (Good Manufacturing Practices) and GLP (Good Laboratory Practices). On ECHEMI, you can select API chemical products on your demand from various active pharmaceutical ingredient manufacturers and distributors.

Active Pharmaceutical Ingredients Suppliers

Buying Active Pharmaceutical Ingredients (APIs) can still be challenging, especially when quality, compliance, and supply stability matter most. On ECHEMI, you can access 743 qualified manufacturers and 379 verified distributors across China, India, the USA, Europe, and other regions. Compare API specifications, review compliance standards, and connect directly with reliable suppliers to support your pharmaceutical production and research needs.
Explore active pharmaceutical ingredients for your specific needs now.
4831 Active Pharmaceutical Ingredients items

Terbinafine

CAS No: 91161-71-6

Formula: C21H25N

Categories: Active Pharmaceutical Ingredients > Synthetic Anti-infective Drugs

Terbinafine (TDT 067) is an antifungal medication used to treat fungal infections. It is a potent non-competitive inhibitor of squalene epoxidase from Candida with a Ki of 30 nM. More

Clindamycin

CAS No: 18323-44-9

Formula: C18H33ClN2O5S

Categories: Active Pharmaceutical Ingredients > Antibiotics

Clindamycin is an oral protein synthesis inhibitory agent that has the ability to suppress the expression of virulence factors in Staphylococcus aureus at sub-inhibitory concentrations (sub-MICs). Clindamycin resistance results from enzymatic methylation of the antibiotic binding site in the 50S ribosomal subunit (23S rRNA). Clindamycin decreases the production of Panton-Valentine leucocidin (PVL), toxic-shock-staphylococcal toxin (TSST-1) or alpha-haemolysin (Hla)[1]. More

Docetaxel

CAS No: 125354-16-7

Formula: C45H55NO15

Categories: Active Pharmaceutical Ingredients > Antineoplastic Agents

Docetaxel is available in single-dose vials of 20 mg/0.5 mLand 80 mg/2 mL for IV administration in the treatment of breast, NSCLC, and prostate cancers. It has also been utilizedin non–FDA-approved treatment of head, neck, gastric,bladder, and refractory ovarian cancers. Docetaxel is highly plasma protein bound (80%) andwidely distributed with the highest concentration in the hepatobiliarysystem, but it does not appear to cross the bloodbrainbarrier. More

Vitamin D3

CAS No: 67-97-0

Formula: C27H44O

Categories: Active Pharmaceutical Ingredients > Oral Care

Cholecalciferol(Vitamin D3) is a naturally occuring form of vitamin D; Reported that upon metabolic activation, Cholecalciferol induces cell differentiation and prevents proliferation of cancer cells. IC50 value:Target: Vitamin D acts through a receptor that is a member of the ligand-dependent transcription factor superfamily. Modulates the proliferation and differentiation of both normal and cancer cells. Has antiproliferative and antimetastatic effects on breast, colon, and prostate caMore

Tenofovir

CAS No: 147127-20-6

Formula: C9H14N5O4P

Categories: Active Pharmaceutical Ingredients > Phosphines

White Crystalline SolidChEBI: A member of the class of phosphonic acids that is methylphosphonic acid in which one of the methyl hydrogens is replaced by a [(2R)-1-(6-amino-9H-purin-9-yl)propan-2-yl]oxy group. An inhibitor of HIV-1 reverse transcriptase, the bis(isopropyloxycarbonyloxy ethyl) ester (disoproxil ester) prodrug is used as the fumaric acid salt in combination therapy for the treatment of HIV infection.More

Betacarotene

CAS No: 7235-40-7

Formula: C40H56

Categories: Active Pharmaceutical Ingredients > Cosmetic Colorant

Beta Carotene is an organic compound and classified as a terpenoid. It is a precursor (inactive form) of vitamin A.Target: OthersBeta Carotene is a strongly colored red-orange pigment abundant in plants and fruits.β-Carotene is biosynthesized from geranylgeranyl pyrophosphate. It is a member of the carotenes, which are tetraterpenes, synthesized biochemically from eight isoprene units and thus having 40 carbons. Among this general class of carotenes, β-carotene is distinguished by havingMore

Gabapentin

CAS No: 60142-96-3

Formula: C9H17NO2

Categories: Active Pharmaceutical Ingredients > Nervous System Drugs

Gabapentin (Neurontin) is a pharmaceutical drug, specifically a GABA analog. It was originally developed to treat epilepsy, and currently is also used to relieve neuropathic pain.IC50 Value: 140 nM (α2δ subunit of calcium channel) [1]Target: Calcium Channelin vitro: Gabapentin, baclofen and CGP 44532 all reduced the electrically stimulated release of [3H]glutamic acid (IC50=20 microM, 0.8 microM and 2 microM, respectively). Gabapentin was without effect on the release of [3H]GABA, whilstMore

Allantoin

CAS No: 97-59-6

Formula: C4H6N4O3

Categories: Active Pharmaceutical Ingredients > Skin Conditioning

Allantoin is a skin conditioning agent that promotes healthy skin, stimulates new and healthy tissue growth.More

Octanoic acid

CAS No: 124-07-2

Formula: C8H16O2

Categories: Active Pharmaceutical Ingredients > Perfuming

Caprylic acid, CH3(CH2)6COOH, also known as hexylacetic acid,n-octanoic acid, octylie acid, and octic acid, is a colorless oily liquid fatty acid with a melting point of 16 DC. It is found in butter, coconut oil, and other fats. It is used in manufacturing drugs and dyes.More

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Ethylene oxide

CAS No: 75-21-8

Formula: C2H4O

Categories: Active Pharmaceutical Ingredients > Synthetic Anti-infective Drugs

Ethylene oxide is the simplest cyclic ether. It is a colorless gas or liquid and has a sweet, etheric odor. Ethylene oxide is a flammable, very reactive and explosive chemical substance. On decomposition, vapors of pure ethylene oxide mix with air or inert gases and become highly explosive. Ethylene oxide, is used in large scale as an intermediate in the production of monoethylene glycol, diethylene glycol, triethylene glycol, poly(ethylene) glycols, ethylene glycol ethers, ethanolamine, ethoxyMore

Levofloxacin

CAS No: 100986-85-4

Formula: C18H20FN3O4

Categories: Active Pharmaceutical Ingredients > Inhibitor Drugs

Levofloxacin, a synthetic fluoroquinolone, is an antibacterial agent that inhibits the supercoiling activity of bacterial DNA gyrase, halting DNA replication.Target: AntibacterialLevofloxacin reduced bacterial load compared with placebo by 4.9-fold (95% confidence interval, 1.4-25.7; P=0.02) at day 7 but had no effect at any point on any marker of neutrophilic airway inflammation. In patients with a baseline bacterial load of more than 10(6) cfu/mL, levofloxacin treatment was associatedMore

Pyridoxine

CAS No: 65-23-6

Formula: C8H11NO3

Categories: Active Pharmaceutical Ingredients > Antistatic

Pyridoxine is a pyridine derivative. Pyridoxine exerts antioxidant effects in cell model of Alzheimer's disease via the Nrf-2/HO-1 pathway.More

Clarithromycin

CAS No: 81103-11-9

Formula: C38H69NO13

Categories: Active Pharmaceutical Ingredients > Antibacterials

Clarithromycin is a macrolide antibiotic and a CYP3A4 inhibitor.Target: Antibacterial; CYP3A4Clarithromycin is a macrolide antibiotic used to treat pharyngitis, tonsillitis, acute maxillary sinusitis, acute bacterial exacerbation of chronic bronchitis, pneumonia (especially atypical pneumonias associated with Chlamydophila pneumoniae), skin and skin structure infections. Clarithromycin prevents bacteria from growing by interfering with their protein synthesis. It binds to the subunit 50SMore

Calcium pantothenate

CAS No: 137-08-6

Formula: C9H17NO5.1/2Ca

Categories: Active Pharmaceutical Ingredients > Hair Conditioning

D-Pantothenic acid hemicalcium salt, a kind of water solublevitamin, can reduce the patulin content of the apple juice.IC50 value:Target:In vitro: In human dermal fibroblasts from three different donors, D-Pantothenic acid hemicalcium salt accelerates the wound healing process by increasing the number of migrating cells, their distance and hence their speed. In addition, cell division is increased and the protein synthesis changed [1].In vivo: More

Chromic acid (H2CrO4)

CAS No: 7738-94-5

Formula: CrH2O4

Categories: Active Pharmaceutical Ingredients > Synthetic Anti-infective Drugs

Chromic acid (H₂CrO₄), a strong oxidizing agent, is a highly corrosive compound often encountered as a solution of chromium trioxide (CrO₃) in sulfuric acid. Chromic acid is highly soluble in water, forming a characteristic orange solution. More

Quercetin

CAS No: 117-39-5

Formula: C15H10O7

Categories: Active Pharmaceutical Ingredients > Antioxidant Ingredient

It is yellow needle-like crystalline powder. It has good thermal stability with the decomposition temperature being 314 °C. It can improve the light-tolerance property of food pigment for preventing the change of the flavor of food. Its color will change in case of metal ion. It is slightly soluble in water, soluble in an alkaline aqueous solution. Quercetin and its derivatives is a kind of flavonoid compound which are widely present in a variety of vegetables and fruits such as onions, sea bucMore

Entecavir

CAS No: 142217-69-4

Formula: C12H15N5O3

Categories: Active Pharmaceutical Ingredients > Synthetic Anti-infective Drugs

White to Off-White/Yellow Crystalline PowderChEBI: Guanine substituted at the 9 position by a 4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl group. A synthetic analogue of 2'-deoxyguanosine, it is a nucleoside reverse transcriptase inhibitor with selective antiviral activity against hepatitis B virus Entecavir is phosphorylated intracellularly to the active triphosphate form, which competes with deoxyguanosine triphosphate, the natural substrate of hepatitis B virus reverse transcriptasMore

(+)-Gibberellic acid

CAS No: 77-06-5

Formula: C19H22O6

Categories: Active Pharmaceutical Ingredients > Biopesticides

Gibberellic Acid is named after a fungus Gibberella fujikuroi . Gibberellic Acid regulates processes of plant development and growth, including seed development and germination, stem and root growth, cell division, and flowering time[1]. More

Active Pharmaceutical Ingredients Market

Market report will help you efficiently source API chemicals! ECHEMI can provide export and import data of API products you need to monitor and analyze the API market!
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Frequently Asked Questions

Are APIs safe to store and transport?

APIs must be handled according to regulatory and safety guidelines. Proper storage conditions, protective equipment, and transportation protocols are required to maintain stability and prevent contamination or hazards.

What industries use APIs?

APIs are widely used in pharmaceutical, veterinary, nutraceutical, and chemical research industries. They are essential for manufacturing medications, supplements, and experimental formulations.

How can I buy active pharmaceutical ingredients in bulk?

You can find certified API manufacturers and traders on ECHEMI. They provide detailed product information, CAS numbers, and safety data sheets (SDS) to ensure safe and reliable bulk purchases.

What are the top selling APIs on ECHEMI?

The top selling APIs on ECHEMI include Veterinary Raw Materials, Anesthetic Agents, Antiallergic Drugs, Feed Additives, Hormones and Endocrine Drugs, Digestive System Drugs, Vitamins and Minerals, Synthetic Anti-infective Drugs, Respiratory Drugs, and other chemical drugs.

What are active pharmaceutical ingredients?

Active Pharmaceutical Ingredients, also known as APIs, are the main active ingredients in a pharmaceutical drug to provide the intended therapeutic effect. APIs can be chemically synthesized or obtained from natural sources like plants and animals. After identifying the API, it is combined with other inactive ingredients to create a drug product that can be taken in different forms, such as tablets, capsules or injections.

What are the most common active pharmaceutical ingredients?

Here are some examples of common API chemicals.

1) Paracetamol (Acetaminophen) - a pain reliever and fever reducer

2) Ibuprofen - a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain, fever, and inflammation

3) Aspirin - a medication used to reduce pain, fever, and inflammation and also used as a blood thinner

4) Amoxicillin - an antibiotic used to treat bacterial infections

5) Metformin - an oral medication for type 2 diabetes that lowers blood sugar levels

6) Omeprazole - a proton-pump inhibitor (PPI) used to reduce stomach acid production

7) Atorvastatin - a medication used to lower cholesterol levels in the blood

8) Sertraline - an antidepressant medication belonging to the class of selective serotonin reuptake inhibitors (SSRIs)

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