Cat.No. Product Name CAS Inquiry
CDA3-0005 Acetyl Glutathione Cyclodextrin Inclusion Complex Inquiry
CDA3-0007 Water Soluble Vanillin Inclusion Complex Inquiry
CDA3-0008 Water Soluble Azelaic Acid Inclusion Complex Inquiry
CDA3-0009 Water Solubility Salicylic Acid Inclusion Complex Inquiry

About Antioxidants

AntioxidantsAntioxidants are excipients that improve the stability of pharmaceuticals by delaying the oxidation of active substances and other excipients. Antioxidants are commonly used to prevent the proliferation of microorganisms that arise under conditions of use. The use of antioxidants provided by CD Formulation can reduce the environmental stress of free radicals.

Function of Antioxidants

Antioxidants are molecules (often specifically in living organisms) that slow or prevent oxidation. Oxidation is a chemical reaction that causes the transfer of electrons from a substance to an oxidant, during which free radicals can be generated, which in turn initiates a chain reaction. When a chain reaction occurs in a cell, the cell is damaged or apoptotic. Antioxidants remove free radicals, terminate the chain reaction and inhibit other oxidation reactions, while being oxidized themselves.

Types of Antioxidants

Antioxidants are used as medical excipients to help combat the deterioration of drugs. Antioxidants are a very important class of preservatives. Some of the preservatives with antioxidant effects include: L-(+)-Ascorbic Acid, Ascorbyl Palmitate, Butylated Hydroxytoluene, etc.

L-(+)-Ascorbic Acid

Ascorbic acid is a natural water-soluble vitamin (Vitamin C). Ascorbic acid is a potent reducing and antioxidant agent that performs multiple roles physiologically.  It is found in citrus and other fruits, and in vegetable and cannot be produced or stored by humans and must be obtained in the diet. Ascorbic acid occurs as a white to light-yellow-colored, nonhygroscopic, odorless, crystalline powder or colorless crystals with a sharp, acidic taste.

Ascorbyl Palmitate

Ascorbyl palmitate, also known as vitamin c-palmitate or asc-6-O-palmitate, belongs to the class of organic compounds known as fatty acid esters. These are carboxylic ester derivatives of a fatty acid. Ascorbyl palmitate exists as a solid and is considered to be practically insoluble (in water) and relatively neutral.

Butylated Hydroxytoluene

Butylated hydroxytoluene (BHT) is a phenolic antioxidant used as a food additive. It is frequently added to dried cereals, cooking oils and animal foods. BHT is also known to enhance the stability of Pharmaceuticals, fat-soluble vitamins and cosmetics. As antioxidant in Pharmaceuticals, cosmetics and oil& fat in food. Delay or prevent oxidative rancidity of oil and fat and loss of fat-soluble vitamins. Can be used alone or in combination with synergists such as citric acid and phosphoric acid. It has antiviral activity and can be used for treatment of lip surface simple cell rash.

CD Formulation is a leading manufacturer of excipients, serving the pharmaceutical industry to help it improve the performance of its products. We develop, produce and sell pharmaceutical excipients for solid, semi-solid and liquid dosage forms. We can provide pre-formulation, formulation, analysis and customized pharmaceutical excipients services to meet customer needs and formulation challenges. If you have any requirements for excipients, please contact us by phone or email, and our colleagues will reply to you within 2-4 working days.


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