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Send EmailCocamidopropyl Betaine, CAPB, CAB-35, CAB-45, 61789-40-0
Cocamidopropyl Betaine (CAPB)
1. Product Identity
| Property | Details |
|---|---|
| Product Name | Cocamidopropyl Betaine |
| Abbreviations | CAPB, CAB |
| CAS Number | 61789-40-0 |
| EC Number | 263-058-8 |
| Molecular Formula | C₁₉H₃₈N₂O₃ |
| Molecular Weight | 342.52 g/mol |
| Chemical Type | Amphoteric Surfactant |
| HS Code | 3402.11.00 – Other organic surface-active agents |
2. Synonyms and Other Names
Common Names
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Cocamidopropyl Betaine
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CAPB
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CAB (Coco Amido Betaine)
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Coconut oil amidopropyl betaine
Trade Names
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Tego® Betain
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Dehyton® PK
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Empigen® BB
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Mackam® CB-35
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Mirataine® BET-C 30
Chemical Names
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1-Propanaminium, 3-amino-N-(carboxymethyl)-N,N-dimethyl-, N-coco acyl derivatives, inner salt
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N-(Coco alkyl) amidopropyl betaine
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Cocoamidopropyldimethylglycine
3. Product Description
Cocamidopropyl Betaine (CAPB) is an amphoteric surfactant derived from coconut oil. It exhibits both anionic and cationic properties, making it effective over a wide pH range. It is widely used in personal care products, especially in baby shampoos, shower gels, facial cleansers, and sensitive skin products.
Key Features:
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High compatibility with other surfactants
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Viscosity enhancing effect
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Rich and stable foam formation
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Low irritation potential (suitable for sensitive skin)
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Antimicrobial activity
4. Physical and Chemical Properties
| Property | Value |
|---|---|
| Appearance (25°C) | Colorless to pale yellow, clear liquid |
| Odor | Neutral, odorless or faint characteristic odor |
| Density (25°C) | Approx. 1.05 - 1.057 g/cm³ |
| Boiling Point | ~100 °C (with water) |
| Melting/Freezing Point | -10 °C |
| pH (10% solution) | 4.0 – 7.0 (depending on grade) |
| Solubility | Completely soluble in water |
| Cloud Point (1% in water) | -3 °C |
| Flash Point (1% in water) | >94 °C |
5. Technical Specifications (By Grade)
CAPB is typically classified by its active matter content. The two most common grades are CAB-35 and CAB-45.
| Parameter | CAB-35 | CAB-45 |
|---|---|---|
| Classification | Amphoteric surfactant | Amphoteric surfactant |
| Appearance (25°C) | Colorless – pale yellow liquid | Colorless – pale yellow liquid |
| Density (g/ml, 25°C) | 1.05 | 1.05 |
| Color (Hazen) | ≤100 | ≤100 |
| Active Matter Content (%) | 28.0 – 32.0 | 38.0 – 42.0 |
| Solid Content (%) | 33.0 – 37.0 | 43.0 – 47.0 |
| pH (1% solution) | 4.0 – 7.0 | 5.0 – 7.0 |
| Sodium Chloride (NaCl) (%) | ≤6.0 | ≤7.0 |
| Free Amine (%) | ≤0.5 | ≤0.5 |
| Cloud Point (1% in water) | -3 °C | -3 °C |
| Freezing Point | -10 °C | -10 °C |
| Flash Point | >94 °C | >94 °C |
6. Antimicrobial Activity
Cocamidopropyl Betaine exhibits antimicrobial activity against the following common microorganisms:
| Microorganism | Activity |
|---|---|
| Staphylococcus aureus | Effective |
| Streptococcus pyogenes | Effective |
| Bacillus subtilis | Effective |
| Candida albicans | Effective |
| Pityrosporum ovale | Effective |
7. Applications and Uses
CAPB is a versatile surfactant with a wide range of applications.
7.1. Personal Care and Cosmetic Products
| Product Type | Function |
|---|---|
| Baby Shampoos | Gentle cleansing for sensitive skin, tear-free formulation |
| Shower Gels and Foam Baths | Rich foam, soft skin feel |
| Facial Cleansers | Gentle cleansing, low irritation risk |
| Sensitive Skin Products | Preferred in dermatological formulations |
| Hair Care Products | Foaming and conditioning in shampoos and conditioners |
| Makeup Removers | Gentle but effective cleansing |
7.2. Detergents and Cleaning Products
| Product Type | Function |
|---|---|
| Liquid Hand Soaps | Foam booster, viscosity regulator |
| Dishwashing Detergents | Grease removal, foam stabilizer |
| Laundry Detergents | Co-surfactant, anti-redeposition agent |
| Industrial Cleaners | Antimicrobial effect, cleaning power enhancer |
| Household Cleaners | Foaming and cleaning in surface cleaners |
7.3. Other Industrial Applications
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Metalworking fluids
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Agricultural chemicals
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Textile processing aids
8. Formulation Examples
8.1. Economical Antibacterial Hand Soap Formulation
| Ingredient | % Amount | Function |
|---|---|---|
| SLES 70% | 3.5 | Primary surfactant |
| CAB 35% | 3.0 | Secondary surfactant, foam booster |
| CDEA 85% | 1.0 | Secondary surfactant, foam stabilizer |
| PCMX | 0.2 | Antiseptic |
| EDTA-2Na | 0.1 | Chelating agent |
| Fragrance, dye, etc. | q.s. | Additives |
| Deionized water | q.s. | Carrier |
| Salt (NaCl) | q.s. | Viscosity modifier |
| Citric acid | q.s. | pH adjuster (7–8) |
8.2. Grease-Cutting Dishwashing Detergent Formulation
| Ingredient | % Amount | Function |
|---|---|---|
| Caustic soda | 1.0 | Neutralizer |
| LABSA 96% | 7.0 | Primary surfactant |
| SLES 70% | 8.0 | Primary surfactant |
| CAB 35% | 3.0 | Secondary surfactant, foam stabilizer |
| EDTA-2Na | 0.5 | Chelating agent |
| Fragrance, dye, etc. | q.s. | Additives |
| Deionized water | q.s. | Carrier |
| Salt (NaCl) | q.s. | Viscosity modifier |
| Citric acid | q.s. | pH adjuster (7–8) |
8.3. Concentrated Laundry Detergent Formulation
| Ingredient | % Amount | Function |
|---|---|---|
| Caustic soda | 0.4 | Neutralizer |
| LABSA 96% | 3.0 | Primary surfactant |
| SLES 70% | 14.0 | Primary surfactant |
| CAB 35% | 10.0 | Secondary surfactant, foam booster |
| OP-10 | 4.0 | Secondary surfactant |
| AEO-9 | 4.0 | Secondary surfactant |
| EDTA-2Na | 0.2 | Chelating agent |
| Fragrance, dye, etc. | q.s. | Additives |
| Deionized water | q.s. | Carrier |
| Salt (NaCl) | q.s. | Viscosity modifier |
| Citric acid | q.s. | pH adjuster (7–8) |
9. Safety and Storage
| Parameter | Details |
|---|---|
| Skin Tolerance | Low irritation potential, safe for sensitive skin |
| Eye Irritation | Minimal, safely used in baby shampoos |
| Transport Classification | Not subject to ADR classification (non-hazardous) |
| Storage Temperature | 5–30 °C, cool and dry place |
| Packaging Material | PE, PP, or HDPE containers preferred (avoid non-stainless metal tanks) |
| Shelf Life | 12–24 months under proper conditions |
| Freezing | May be affected by freeze-thaw cycles; if frozen, warm and mix to homogenize |
10. Advantages and Summary
Cocamidopropyl Betaine (CAPB, CAS: 61789-40-0) is an amphoteric surfactant derived from coconut oil. It is a pale yellow liquid, completely soluble in water, and effective over a wide pH range.
Key Advantages:
| Advantage | Description |
|---|---|
| ✅ Gentle Cleansing | Low irritation potential, safe for baby and sensitive skin products |
| ✅ Foam Booster | Produces rich, stable, and creamy foam |
| ✅ Viscosity Modifier | Acts as a thickening agent in formulations |
| ✅ Compatibility | Excellent compatibility with anionic, cationic, and nonionic surfactants |
| ✅ Antimicrobial | Effective against various bacteria and fungi |
| ✅ Biodegradable | Environmentally friendly, suitable for green chemistry |
Main Application Areas:
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Personal Care: Baby shampoos, shower gels, facial cleansers, sensitive skin products
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Household Cleaning: Hand soaps, dishwashing detergents, laundry detergents
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Industrial: Metalworking, agricultural chemicals, textiles
Grade Selection:
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CAB-35 (30% active): Ideal for general-purpose personal care and household cleaning products
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CAB-45 (40% active): Suitable for concentrated formulations and high-performance applications
CAPB is an indispensable component of modern detergent and cosmetic formulations. With its gentle nature, excellent foaming properties, and high compatibility with other ingredients, it finds wide application in both consumer products and industrial uses.
