leave in hair serum

1. INCI & CAS

INCI: Glycerin · CAS: 56-81-5

2. Role in the formula

Glycerin fills a polyol-humectant role in the listed cosmetic formats. Read its percentage as formulation guidance, not an assay.

3. Typical use levels (formulation guide)

• The gels and serums use-level reference is 3–8%.
• The formulation record indicates 2–5% for creams for the formula.
• For rinse-off, the reference gives 2–4%.

Add Glycerin to the water phase; no separate melt step is needed.

4. Regulatory sources & global compliance

• If CosIng lists Glycerin, that listing remains ingredient information; check rules for the intended market and use.
• Before EU placement, Regulation (EC) No 1223/2009 requires an assessment addressing the safety of the finished product that contains Glycerin for the complete formula intended for sale.
• Use current supplier documentation for the purchased Glycerin grade and verify applicable destination-market filings.

5. Safety & risk assessment

This level is a cosmetic-formulation guide; the note establishes neither drug approval nor OTC-monograph status so patch response and stability should be checked on the finished product.

6. Stability & packaging

Keep bulk supplies closed, cool, and protected from sunlight; review airless or pump options if oxidation presents a concern; use batch testing to verify stability and package compatibility.

7. Claims language (Do / Don’t)

• The cosmetic role of Glycerin is presented as humectant function.

• The ingredient guidance is not evidence of drug claims, cure claims, or a certification that is absent from the product records.
• The documented facts for Glycerin is not evidence for skin whitening, treatment of acne, sweat control, UV protection, or hair-growth results.

1. INCI & CAS

INCI: Propanediol · CAS: 504-63-2

2. Role in the formula

This cosmetic-formulation note assigns 1,3-propanediol humectant and solvent functions; the ingredient is not propylene glycol.

3. Typical use levels (formulation guide)

• Most water chassis may use the guide range 2–8% in this reference.

The water phase is the addition point for Propanediol.

4. Regulatory sources & global compliance

• CosIng information about Propanediol does not itself authorize a particular grade or finished cosmetic.
• For cosmetics placed on the EU market, Regulation (EC) No 1223/2009 requires the final cosmetic with Propanediol to undergo a safety assessment before the cosmetic is placed on the EU market.
• Verify the purchased Propanediol grade using supplier data, alongside the applicable filing rules for the destination market.

5. Safety & risk assessment

The stated concentration is a cosmetic-development reference; it does not qualify a finished product as a drug or OTC product so assess patch response and stability in the final formula.

6. Stability & packaging

Store the bulk in a closed container in a cool, shaded place; review airless or pump options if oxidation presents a concern; check the final package and formula together for compatibility and stability.

7. Claims language (Do / Don’t)

• This guide frames Propanediol's cosmetic direction around propanediol solvent.

• The cosmetic listing does not support drug claims, cure claims, or a certification that is absent from the product records.
• The ingredient record for Propanediol provides no basis for whitening, acne care as treatment, perspiration reduction, sun protection, or hair growth.

1. INCI & CAS

INCI: Sodium Hyaluronate · CAS: 9067-32-7

2. Role in the formula

Sodium hyaluronate is the salt form used in cosmetic gels and serums. Molecular weight is a supplier choice and is not fixed on this page.

3. Typical use levels (formulation guide)

• The guide range for serums and gels is 0.1–0.5%.
• Creams: 0.05–0.3% in this reference.

Hydrate in water before gum. Avoid dumping powder onto a finished thick gel.

4. Regulatory sources & global compliance

• CosIng may identify Sodium Hyaluronate as an ingredient, but its entry does not approve a material grade or finished formula.
• The finished-product provisions of Regulation (EC) No 1223/2009 require the complete cosmetic containing Sodium Hyaluronate to receive its own safety assessment for the completed formula, not simply for an ingredient in isolation.
• Use current supplier documentation for the purchased Sodium Hyaluronate grade and verify applicable destination-market filings.

5. Safety & risk assessment

This formulation note gives a cosmetic-use reference level; it should not be read as a drug authorization or OTC listing while finished-product patch and stability testing remain necessary.

6. Stability & packaging

Keep the ingredient in cool, closed bulk storage away from sunlight; match the pack choice to the system's oxidation risk; follow with stability and packaging checks on the confirmed batch.

7. Claims language (Do / Don’t)

• The cosmetic formulation concept for Sodium Hyaluronate centers on hydration-polymer.

• The cosmetic listing provides no basis for claims of drug activity, a clinical cure, or an undocumented product certification.
• The ingredient record for Sodium Hyaluronate provides no basis for a whitening result, acne-treatment effect, antiperspirant use, sunscreen performance, or hair growth.