Substantive Soy Protein for Conditioning Hair and Skin
Quaternized soy protein bridges the gap between a natural protein and a conditioning agent. The lauryl-based cationic group makes it substantive to hair and skin, so the conditioning feel lasts beyond the rinse. Quaternized Soy Protein Liquid BLP is a budget-friendly way to upgrade shampoos, conditioners and moisturizers.
Why Formulators Choose Quaternized Soy Protein Liquid
It offers one of the most affordable routes to cationic protein conditioning on the US market, with a wide use range and a stated pH stability window of 4 to 7 from supplier data. It is a smart upgrade for mass-market and private-label lines.
Key Benefits
- Cationic, substantive conditioning on hair
- Easier combing and reduced fly-aways
- Smooth, conditioned after-feel on skin
- Wide 1 to 10% use range
- Cost-effective cationic protein
Where to Use It
- Shampoos and 2-in-1 formulas
- Conditioners and hair masks
- Moisturizers and hand creams
- Shaving creams
- Body washes
How to Use
Add to the water phase. Keep the final formula within pH 4 to 7. Check compatibility with anionic thickeners. Recommended use level: 1 to 10%. This is a raw cosmetic ingredient for use in formulations only, not for direct application to skin or hair.
Characteristics
- INCI: Laurdimonium Hydroxypropyl Hydrolyzed Soy Protein
- Source: Plant-derived (soy), cationically modified
- Form: Liquid
- Solubility: Water-soluble
- Recommended use level: 1 to 10%
- Sizes: 4 oz, 8 oz, 1 lb, 2 lb and 8 lb
Formulator Tips
- Pair with hydrolyzed soy protein for a two-level soy system: film plus substantive conditioning.
- In moisturizers, 1 to 2% adds a silky, conditioned feel.
- Label soy content for customers who avoid soy.
Pairs Well With
Build a complete system with our Wheat and Soy Amino Acids Vegan Keratin Alternative and D-Panthenol 75%. Looking for more actives? Browse our hair care ingredients.
FAQ
What makes it different from hydrolyzed soy protein?
A cationic group is attached, making it substantive to hair and skin for longer-lasting conditioning.
Is it plant-based?
Yes, it is derived from soy protein.
Which pH range should I use?
Supplier data lists stability between pH 4 and 7.
Explore the Hydrolyzed Protein Range
Compare every format in our hydrolyzed protein liquids collection, see dry formats among our hydrolyzed protein powders, or start from the hydrolyzed proteins for cosmetics hub.
For cosmetic manufacturing use only. Specifications can vary by lot; refer to the Certificate of Analysis supplied with your order. Statements on this page have not been evaluated by the FDA and the ingredient is not intended to diagnose, treat, cure or prevent any disease.


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