Cocamidopropyl Hydroxysultaine (CHSB)
Product Name: Cocamidopropyl Hydroxysultaine (CHSB)
INCI Name: Cocamidopropyl Hydroxysultaine
CAS Number: 68139-30-0
EINECS Number: 268-761-3
HS Code: 34021300
Appearance (25°C): Colorless to pale yellow clear liquid
Odor: Very mild characteristic odor, no foreign smell
pH Value (1% aqueous solution): 5.0 - 7.0
Heavy Metals (as Pb): ≤10 ppm
Arsenic (As): ≤2 ppm
Storage Conditions: 15-35°C, protected from direct sunlight, sealed containers
Shelf Life: 24 months
Cocamidopropyl Hydroxysultaine, CHSB, CAS 68139-30-0, hydroxysultaine, betaine surfactant, mild surfactant
Cocamidopropyl Hydroxysultaine (CHSB)-CAS 68139-30-0
Cocamidopropyl Hydroxysultaine (CHSB) is the premium ultra-mild amphoteric surfactant, representing the highest evolution of betaine chemistry. Unlike conventional Cocamidopropyl Betaine (CAPB / CAB) which uses a carboxylate group (-COO⁻), CHSB incorporates a hydroxysulfonate group (-CH₂CH(OH)CH₂SO₃⁻) - delivering dramatically improved mildness, better hard water tolerance, superior foam quality, and exceptional thickening synergy.
The hydroxyl group in the molecular structure reduces protein denaturation and eye irritation to near-zero levels, making CHSB the gold standard for "tear-free" baby shampoos and ophthalmologically-tested facial cleansers. It is significantly milder than standard CAPB, with lower nitrosamine formation potential and no free amidoamine impurities. For formulators creating premium gentle cleansing products, CHSB is the undisputed first choice.
Key Benefits
✅ Hydroxysulfonate group = no protein denaturation, no skin barrier disruption
✅ Excellent thickening synergy with SLES and amino acid surfactants
✅ Rich, dense, creamy, stable foam - better than CAPB
✅ Perfect hard water tolerance - unaffected by water hardness
✅ Broad pH stability 4.0-9.0 - works in all formulations
✅ Universal compatibility with ALL surfactant classes
✅ Lower nitrosamine potential - safer than conventional betaines
✅ No free amidoamine (the CAPB irritant impurity)
✅ Excellent conditioning and antistatic properties for hair
Applications
Premium Personal Care (Primary):
• Tear-Free Baby Shampoos & Washes: 3-8% - zero eye irritation
• Sensitive Skin Facial Cleansers: 3-6% - ophthalmologically tested
• Premium Sulfate-Free Shampoos: 3-7% - foam booster & thickener
• Luxury Body Washes: 3-6% - ultra-gentle creamy lather
• Eczema/Rosacea Cleansers: 2-5% - barrier-friendly cleansing
• Micellar Waters: 1-3% - gentle solubilization
• Hand Soaps: 3-8% - mild, high-foam
Formulation Best Practices:
• ✅ CLASSIC SYNERGY: SLES + CHSB 3:1 ratio - better viscosity than CAPB
• ✅ PREMIUM GENTLE: Sodium Cocoyl Glycinate + CHSB 2:1 ratio
• ✅ THICKENING: CHSB provides better salt thickening response than CAPB
• ✅ pH RANGE: Optimal 5.0-7.0 for maximum mildness
• ✅ TEAR-FREE FORMULA: 5% CHSB + no SLS/SLES = baby shampoo gold standard
• ❌ AVOID: High heat >80°C prolonged exposure
• �� INDUSTRY SECRET: Replace CAPB with CHSB = instant mildness upgrade, same cost
Certificate Of Analysis (COA)
Test Item | Specification | Test Result | Test Method |
Product Identification | |||
Product Name | Cocamidopropyl Hydroxysultaine 35% | CHSB Premium Grade | —— |
CAS Number | 68139-30-0 | 68139-30-0 | —— |
Raw Material Source | RSPO Certified Coconut Oil | Sustainable Palm | —— |
Physical Properties | |||
Appearance | Colorless to pale yellow clear liquid | Water-white clear liquid | Visual |
Odor | Mild characteristic | Conforms | Olfactory |
Active Matter | 33.0 - 37.0% | 35.2% | Titration |
pH Value (1% Solution) | 5.0 - 7.0 | 6.1 | pH Meter |
Viscosity (25°C) | 1,000-5,000 mPa·s | 2,800 mPa·s | Brookfield |
Color (APHA) | ≤100 | 35 | Colorimeter |
Chemical Purity | |||
Sodium Chloride | ≤6.0% | 4.8% | Mohr Method |
Free Amine | ≤0.5% | 0.21% | Titration |
Monochloroacetic Acid | ≤10 ppm | <5 ppm | HPLC |
Moisture Content | Balance | 59.7% | Karl Fischer |
Safety & Impurities | |||
Heavy Metals (as Pb) | ≤10 ppm | <5 ppm | ICP-MS |
Arsenic (As) | ≤2 ppm | <0.5 ppm | ICP-MS |
Mercury (Hg) | ≤0.1 ppm | <0.05 ppm | ICP-MS |
Microbiological | |||
Total Aerobic Count | ≤100 CFU/g | <10 CFU/g | Plate Count |
Yeast & Mold | ≤10 CFU/g | <10 CFU/g | Plate Count |
E. coli, Salmonella | Negative | Negative | —— |
Final Conclusion | —— | PASSED - EXCEEDS SPECIFICATION | —— |
Frequently Asked Questions (FAQ) & Document Request Frequently Asked Questions (FAQ) & Document Request
Q1: What is the best blend ratio with primary surfactants?
A: The industry standard premium cleansing systems:
• Economy Grade: 15% SLES + 5% CHSB (3:1 ratio)
• Mid-Range: 10% SLES + 5% CHSB + 5% APG
• Premium Sulfate-Free: 10% Sodium Cocoyl Glycinate + 5% CHSB (2:1 ratio)
• Tear-Free Baby: 5% CHSB + 5% Lauryl Glucoside + NO SULFATES
CHSB provides better viscosity building than CAPB in all these blends - you will typically need 20-30% less NaCl for the same target viscosity.
Q2: Is CHSB biodegradable and environmentally friendly?
A: Yes - excellent environmental profile:
• Primary biodegradation: >99% within 7 days
• Ultimate biodegradation: >90% within 28 days
• Aquatic toxicity: Very low, LC50 >100 mg/L
• No bioaccumulation: Log Kow <1
• Renewable carbon: 100% coconut-derived fatty acids
CHSB meets all global environmental standards and is approved for eco-label programs.
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