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BIS-AMINOPROPYL DIGLYCOL DIMALEATE.

Valuable CAS 1629579-82-3 / HAIR CONDITIONING, HAIR WAVING OR STRAIGHTENING, SKIN CONDITIONING

A pioneering bond-building molecule designed to restore structural integrity by cross-linking damaged protein chains. Originally celebrated in professional hair care, it is now emerging in precision skincare for its ability to reinforce the keratin matrix and accelerate tissue recovery.

Bond builder Skin conditioning agent Structural restorer Keratin stabilizer

Science

Functioning as a bifunctional Michael acceptor, this molecule targets broken sulfhydryl groups within cysteine residues. It covalently bridges these gaps to reform and multiply disulfide bonds, effectively 'gluing' the internal structure of keratinous tissues back together to enhance tensile strength and resilience.


Research

High confidence
Effective range 0.1–19%
Optimal

10%

Key findings

  1. 01 Extensive Human Repeat Insult Patch Testing (HRIPT) across concentrations up to 19% confirmed the molecule is a non-sensitizer, refuting previous animal-model concerns.
  2. 02 Phase I and II clinical trials (as BM-3103) demonstrated a high safety profile in acute wound healing applications with no adverse events reported in over 100 human subjects.
  3. 03 In vitro ocular and epidermal models show no irritation potential even at high-load concentrations of 26%.

Transparency

Commonly dusted
Min. effective
1%
Red flag below
0.1%

Because of its high raw material cost and fame as a 'bond builder,' it is frequently included at trace amounts (under 0.1%) for marketing claims. Efficacy in structural reinforcement typically requires concentrations between 1% and 10%.


The Formula

Solubility
Water
Optimal pH 3 – 6
0 7 14

Stability

Optimal stability is maintained in acidic to neutral aqueous environments; however, the ester bonds may undergo hydrolysis if exposed to highly alkaline conditions or extreme acidity.

Synergies

  • Amino acids
  • Hydrolyzed proteins
  • Non-ionic surfactants

Conflicts

  • Strong oxidizing agents
  • Alkaline environments (pH > 8.0)
  • Concentrated anionic surfactants

Safety

CIR Status
Not reviewed
Max tested
19%
Pregnancy
Safe
Sensitization risk Low

While a specific CIR monograph is pending, its structural components are widely recognized as safe. Regulatory bodies like AICIS permit professional use up to 20% when diluted.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

A high-performance structural additive that offers unique protein-linking capabilities for damaged skin and hair barriers.


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