“Molecular-level purification, a new experience”: The stunning performance of hydroxypropyl-β-cyclodextrin in deodorants

Hydroxypropyl-beta-cyclodextrin It is a highly effective and widely used ingredient in deodorants and odor eliminators, primarily due to its unique molecular structure and inclusion capabilities. The key principles and applications in these areas are outlined below:

I. Key Principles:

  1、 Unique Cage-like Structure: HP-β-CD has a hydrophobic cavity and a hydrophilic outer surface. Its cavity size is moderate, making it ideal for encapsulating many odorous organic small molecules.

  2、 Encapsulation of Odor Molecules: Many odor-causing substances (such as sulfides, ammonia, amines, short-chain fatty acids, aldehydes, ketones, certain phenolic compounds, etc.) are hydrophobic or partially hydrophobic and can be captured by the hydrophobic cavity of HP-β-CD, forming host-guest inclusion complexes.

  3、 Physical Removal, Not Masking: This inclusion process is a physical process, not a chemical reaction. It "traps" odor molecules in the cyclodextrin cavity, preventing them from freely volatilizing into the air and being perceived by our olfactory receptors, thus truly removing the odor, rather than simply masking it with a stronger fragrance.

  4、 Slow or No Release: The encapsulated odor molecules are usually stably bound within the cavity and are not easily released under normal conditions, providing a long-lasting effect. Some product designs release the inclusion complex during washing or processing.

II. HP-β-CD can be applied to various types of deodorants and odor eliminators:

1. Personal Care Deodorants/Antiperspirants:

（ 1) Spray type: Quick and convenient, often used for underarms and feet.

（ 2) Roll-on type: Liquid or emulsion texture.

（ 3) Stick/cream type: Solid form.

（ 4) Gel type: Transparent or translucent texture.

Wet wipes: Portable cleaning and deodorizing

function: Directly acts on the skin surface, encapsulating odor molecules (isovaleric acid, short-chain fatty acids, etc.) produced by the decomposition of sweat by bacteria.

2、 Fabric deodorizers /fresheners (1)

(1) Spray type: Used for clothing, sofas, curtains, car interiors, shoes, etc. Quickly removes smoke, food, and sweat odors (2)

(2) Laundry additive: Added during laundry to enhance the odor-removing ability of laundry detergent, especially for stubborn odors (such as hot pot smell, smoke

3、 Home /environmental deodorizers

（1） Air freshener spray: Used for rooms, bathrooms, kitchens, and trash cans.

（2） Gel-type air freshener: Slowly releases fragrance and absorbs environmental odors

（3） Pet deodorizer: Used to eliminate odors (ammonia, thiols, skatole, etc.) from pet urine, feces, and body odor, sprayed on carpets, litter boxes, pet beds, etc. 4、

4. Industrial and special uses

（1） Waste treatment plant odor control

(2) Odor control in specific industrial processes

Hydroxypropyl-beta-cyclodextrin, with its excellent molecular inclusion ability, broad-spectrum deodorizing effect, high safety, good water solubility, and formulation compatibility, has become one of the key active ingredients in modern efficient and mild deodorants and odor eliminators. It provides a physical, non-masking deodorizing solution, widely used in personal care, home cleaning, fabric care, and industrial deodorization, meeting the market demand for efficient, safe, and long-lasting deodorizing products.