1,3-Pentylene Glycol, also known chemically as 1,3-Pentanediol, is a five-carbon aliphatic diol containing two hydroxyl groups. It has the molecular formula C₅H₁₂O₂, a molecular weight of approximately 104.15 g/mol, and CAS Number 3174-67-2.
The compound is a distinct chemical isomer of other pentanediols. Its molecular structure contains hydroxyl groups at the 1 and 3 positions of the carbon chain.
For cosmetic and personal-care applications, 1,3-Pentanediol may be considered as a functional glycol where solvent, moisture-support and formulation properties are required. However, its cosmetic identity should be distinguished from Pentylene Glycol, which generally refers to 1,2-Pentanediol in cosmetic ingredient nomenclature.
This distinction is important for product specifications, technical documentation, procurement, regulatory records and search-engine optimization.
1,3-Pentylene Glycol is the commonly used descriptive name for 1,3-Pentanediol, a low-molecular-weight aliphatic diol.
The systematic name is Pentane-1,3-diol. It contains five carbon atoms and two hydroxyl functional groups.
1,3-Pentanediol should not be treated as interchangeable with every product marketed under the generic term “Pentylene Glycol.” In particular, 1,2-Pentanediol is a different positional isomer and is widely associated with the cosmetic INCI name Pentylene Glycol.
Therefore, commercial product documentation should clearly state 1,3-Pentanediol, CAS 3174-67-2 when this specific material is being supplied.
| Property | Details |
|---|---|
| Product Name | 1,3-Pentylene Glycol |
| Chemical Name | 1,3-Pentanediol |
| IUPAC Name | Pentane-1,3-diol |
| CAS Number | 3174-67-2 |
| Molecular Formula | C₅H₁₂O₂ |
| Molecular Weight | 104.15 g/mol |
| Chemical Class | Aliphatic Diol |
| Carbon Number | C5 |
| Functional Groups | Two Hydroxyl Groups |
| Physical State | Liquid* |
| Cosmetic Naming Note | Distinct from 1,2-Pentanediol / Pentylene Glycol |
*Physical appearance and state should be confirmed against the specific commercial grade and current COA/TDS.
The chemical formula, molecular weight and CAS identity are supported by NIST and PubChem.
As a low-molecular-weight diol, 1,3-Pentanediol can be evaluated as a solvent or co-solvent for compatible formulation components.
Its hydroxyl functionality provides polarity that can support interaction with water and other polar formulation ingredients.
Diol structures can provide moisture-interaction properties that may be useful in personal-care formulations. When used for this purpose, the actual performance of 1,3-Pentanediol should be evaluated within the complete formulation.
1,3-Pentanediol can be considered where a multifunctional glycol is required to support the physical and functional characteristics of a formulation.
Depending on the formulation system, 1,3-Pentanediol may assist with incorporating selected compatible ingredients into aqueous or mixed-phase cosmetic systems.
Glycol-based ingredients can influence the sensory characteristics, spreadability and overall feel of cosmetic formulations. The specific contribution of 1,3-Pentanediol should be evaluated at the intended formulation concentration.
Because published cosmetic information for 1,3-Pentanediol specifically is more limited than for the better-established cosmetic ingredient Pentylene Glycol (1,2-Pentanediol), applications should be determined according to the supplied grade, regulatory status and formulation testing.
Potential formulation areas may include:
Actual use should be based on the applicable technical documentation and formulation compatibility evaluation.
1,3-Pentylene Glycol should be correctly identified during formulation and procurement as 1,3-Pentanediol, CAS 3174-67-2.
This is particularly important because 1,3-Pentanediol and 1,2-Pentanediol are different chemical substances.
The commonly used cosmetic ingredient Pentylene Glycol generally corresponds to 1,2-Pentanediol, whereas 1,3-Pentanediol has CAS 3174-67-2.
Formulators should evaluate:
The final formulation should be evaluated using appropriate stability and performance testing.
Swapnroop provides 1,3-Pentylene Glycol / 1,3-Pentanediol for customers seeking a cosmetic ingredient manufacturer and bulk supplier in India.
The material is identified by CAS 3174-67-2 and can be evaluated for selected cosmetic, personal-care and formulation applications requiring a five-carbon diol.
For commercial procurement, customers should confirm the required grade, specification, application, packaging and quantity before purchase. The current COA/TDS should remain the controlling specification for the supplied material.
1,3-Pentylene Glycol is a descriptive name for 1,3-Pentanediol, a five-carbon aliphatic diol with two hydroxyl groups.
The CAS number of 1,3-Pentanediol is 3174-67-2.
The molecular formula is C₅H₁₂O₂.
The molecular weight is approximately 104.15 g/mol.
No. 1,3-Pentanediol and 1,2-Pentanediol are different positional isomers. In cosmetic nomenclature, Pentylene Glycol commonly refers to 1,2-Pentanediol.
No. 1,3-Butylene Glycol is 1,3-Butanediol and contains four carbon atoms, whereas 1,3-Pentylene Glycol is 1,3-Pentanediol and contains five carbon atoms.
The chemical name is 1,3-Pentanediol, with the IUPAC name Pentane-1,3-diol.
| Parameter | Specification |
|---|---|
| Appearance | Colourless to light-yellow liquid or oily liquid |