Names, forms and identity
Two names that look similar can be two different substances. This page lists the pairs we see confused most often, with the CosIng entry for each.
Commonly confused entries
Tripeptide-1 and Copper Tripeptide-1 are not the same entry
Searches for one of these names frequently return pages about the other.
| INCI entry | CosIng ID | CAS | CosIng description (verbatim) |
|---|---|---|---|
TRIPEPTIDE-1 | 59874 | — | Tripeptide-1 is a synthetic peptide containing glycine, histidine, and lysine |
COPPER TRIPEPTIDE-1 | 55687 | — | Copper Tripeptide-1 is a copper complex of Tripeptide-1 |
COPPER TRIPEPTIDE-1 ACETATE | 100256 | — | Copper Tripeptide-1 Acetate is the complex formed by Copper Tripeptide-1 and Acetic Acid |
Tripeptide-1: free peptide and acetate salt are separate entries
The salt form has its own INCI entry and its own molecular weight.
| INCI entry | CosIng ID | CAS | CosIng description (verbatim) |
|---|---|---|---|
TRIPEPTIDE-1 | 59874 | — | Tripeptide-1 is a synthetic peptide containing glycine, histidine, and lysine |
TRIPEPTIDE-1 ACETATE | 100255 | — | Tripeptide-1 Acetate is the acetate salt of Tripeptide-1 |
Carnosine and its derivatives are separate entries
An acetylated or decarboxylated derivative is not the same material as carnosine.
| INCI entry | CosIng ID | CAS | CosIng description (verbatim) |
|---|---|---|---|
CARNOSINE | 55088 | 305-84-0 | — |
ACETYL CARNOSINE | 87128 | 56353-15-2 | — |
DECARBOXY CARNOSINE HCL | 75429 | 57022-38-5 | — |
Glutathione: reduced and oxidized are separate entries
Both are recorded separately in the CosIng inventory.
| INCI entry | CosIng ID | CAS | CosIng description (verbatim) |
|---|---|---|---|
GLUTATHIONE | 34021 | 70-18-8 | — |
OXIDIZED GLUTATHIONE | 85102 | 27025-41-8 | — |
Collagen: a defined tripeptide and hydrolysed collagen are separate entries
One is a defined synthetic peptide; the other is a hydrolysate of variable composition.
| INCI entry | CosIng ID | CAS | CosIng description (verbatim) |
|---|---|---|---|
TRIPEPTIDE-29 | 83768 | — | Tripeptide-29 is the synthetic peptide consisting of glycine, proline and hydroxyproline |
HYDROLYZED COLLAGEN | 76560 | 92113-31-0 / 73049-73-7 | Collagens, hydrolyzates. Substance obtained by acidic, alkaline, or enzymatic hydrolysis of hoofs and horns composed primarily of amino acids, peptides, and proteins. It may contai |
Palmitoyl Tripeptide-8 and Palmitoyl Tripeptide-1 are separate entries
Both are palmitic-acid derivatives, but of different peptide sequences.
| INCI entry | CosIng ID | CAS | CosIng description (verbatim) |
|---|---|---|---|
PALMITOYL TRIPEPTIDE-8 | 83397 | — | Palmitoyl Tripeptide-8 is the product obtained by the reaction of palmitic acid and Tripeptide-8 |
PALMITOYL TRIPEPTIDE-1 | 92513 | 147732-56-7 | Palmitoyl Tripeptide-1 is the reaction product of palmitic acid and Tripeptide-1 |
What to state in an enquiry
- The name exactly as it appears on the supplier's specification sheet.
- The form you need, such as free base or a named salt, powder or solution.
- The INCI entry name or the CAS number, if you have one to check against.
- The documents you need before you can evaluate the material.
When a page does not name a form
Where a product page does not name one form, tell us the form you need and we will confirm it in our reply.
Where these names come from
The INCI entry names, their CosIng substance identifiers and the descriptions shown above are taken from the European Commission's CosIng inventory. CAS numbers and molecular formulae are checked against PubChem. Where a CosIng entry does not carry a description, the table says so rather than filling the gap.