1,2-Hexanediol
CASRN#
6920-22-5
INCI Name
1,2-HEXANEDIOL
Alternate Names
1,2-Hexanediol, hexane-1,2-diol, DL-1,2-Hexanediol, 1,2-Dihydroxyhexane, 5,6-Dihydroxyhexane
Common Trade Names
Molecular Weight
118 g/mol
Functional Uses
cosurfactant, Solvent, humectant, preservative
Common Impurities
-
Is this a VOC?
Yes
Is this an exempt VOC?
No
Vapor Pressure
0.00432 mm Hg
Octanol-water partition coefficient (log Kow)
0.25
Solubility at 23.5 C
9E+3 mg/l
Boiling Point
228.3 °C
Particle size range as aerodynamic diameter
- - - μm
Hazard Summary
C2C Chemical Rating
c/b
GHS Health
H319
GHS Enviro
None
Assessed by
U.S. EPA Low Priority Chemical report.
Assessment Date
Jul 10, 2020
Assessment Expires
Jul 9, 2025
Verification Status
verified
Executive Summary
1,2-Hexanediol is an alcohol in the diol (or glycol) family. It is an organic chemical compound containing two hydroxyl (-OH) groups on a six-carbon backbone. Because of the adjacent positioning of the two hydroxyl groups, 1,2-alkanediols contain a stereocenter, leading to two stereoisomers: cis1,2-hexanediol and trans-1,2-hexanediol. Because the hydroxyl groups are located on the first and second carbons on one end of a six-carbon chain, 1,2-hexanediol is an amphiphilic molecule that acts as both a cosurfactant and solvent. A cosurfactant increases the effectiveness of surfactants, which are compounds containing both hydrophilic and hydrophobic moieties that work to lower the surface tension at an interface (e.g., between two liquids). Surfactants may function as detergents, emulsifiers, foaming agents, wetting agents, and dispersants in a variety of applications and product sectors. See Section 5 for 1,2-hexanediol’s conditions of use. In addition, 1,2-hexanediol is hygroscopic and thus acts as a humectant, which means that it absorbs water and increases hydration in products. Also, straight-chain 1,2-alkanediols, including 1,2- hexanediol, have broad spectrum antimicrobial properties and are used alone or in combination with other chemicals, to serve as preservatives and/or preservative boosters. These properties contribute to the use of 1,2-hexanediol as a multifunctional ingredient in products.
Hazard Tables

How to read the GHS Hazard Summary Table

 
Carcinogenicity
Mutagenicity
Reproductive Toxicity
Developmental Toxicity
Acute Toxicity
STOT-Single
STOT-Repeated
STOT- Neurotoxicity-Single
STOT- Neurotoxicity-Repeated
Skin Sensitizer
Respiratory Sensitizer
Skin Corrosion/Irritation
Serious Eye Damage/Eye Irritation
Acute Aquatic Toxicity
Chronic Aquatic Toxicity
Ozone Depletion
Oral
Dermal
Inhalation
NC
Rationale
Available data is insufficient for GHS classification: 1,2-hexanediol’s transformation profile, lack of structural alerts in the parent chemical substance, and negative genotoxicity results indicate this chemical is unlikely to be carcinogenic. Lower confidence due to modeled data.
NC
Rationale
Available data is insufficient for GHS classification: 1,2-hexanediol’s transformation profile, lack of structural alerts in the parent chemical substance, and negative genotoxicity results indicate this chemical is unlikely to be carcinogenic. Lower confidence due to modeled data.
NC
Rationale
Available data is insufficient for GHS classification: 1,2-hexanediol’s transformation profile, lack of structural alerts in the parent chemical substance, and negative genotoxicity results indicate this chemical is unlikely to be carcinogenic. Lower confidence due to modeled data.
NC
Rationale
Multiple negative studies indicate low concern for genotoxicity.
CNP
Rationale
No data available.
NC
Rationale
Data indicate no adverse effects on estrous cycle evaluations in females and sperm parameters in males following dermal exposure.
CNP
Rationale
No data available.
NC
Rationale
No adverse effects observed in two prenatal development studies indicate low concern for developmental toxicity.
CNP
Rationale
No data available.
CNP
Rationale
No data available.
NC
Rationale
An OECD Guideline 401 low concern for acute toxicity from oral exposures.
NC
Rationale
Lower confidence due to analog data. Analog data indicate low concern for acute toxicity from dermal exposures.
NC
Rationale
Lower confidence due to analog data. Analog data indicate low concern for acute toxicity from inhalation exposures.
NC
Rationale
No data available.
CNP
Rationale
No data available.
NC
Rationale
No data available.
NC
Rationale
Lower confidence due to analog data. Two studies on analogs indicate low concern for repeated dose toxicity from oral exposures.
NC
Rationale
An OECD Guideline 411 study indicate low concern for repeated dose toxicity from dermal exposures.
CNP
Rationale
No data available.
CNP
Rationale
No data available.
CNP
Rationale
No data available.
CNP
Rationale
No data available.
NC
Rationale
Relevant endpoints measured in analog repeated dose studies indicate low concern for neurotoxicity. Lower confidence due to use of analog data.
CNP
Rationale
No data available.
CNP
Rationale
No data available.
NC
Rationale
The negative findings in this study indicate 1,2-hexanediol is of low concern for skin sensitization.
NC
Rationale
No structural alerts identified for respiratory sensitization. Lower confidence because a lack of structural alerts is insufficient for establishing a GHS classification.
NC
Rationale
These results indicate low concern for 1,2-hexanediol to cause skin irritation.
Cat 2A
Rationale
These results indicate moderate to high concern for eye irritation (with reversible effects) by 1,2-hexanediol and is assigned category 2A.
NC
Rationale
Given the low persistence of 1,2-hexanediol these aquatic toxicity results provide sufficient information to indicate low concern for acute aquatic exposure by exceeding the low-concern benchmark of 10 mg/L and demonstrating greater than 60% biodegradation within 28 days.
NC
Rationale
ECOSAR modeling estimations indicate chronic aquatic toxicity values >10 ppm. Lower confidence due to use of modeling.
NC
Rationale
Chemical is not on Montreal Protocol or IPCC list.
Other
  • Explosives: Not classified
  • Flammable Gases: Not classified
  • Aerosols: Not classified
  • Oxidizing Gases: Not classified
  • Flammable Liquids: Not classified
  • Flammable Solids: Not classified
  • Self-reactive substances and mixtures: Not classified
  • Pyrophoric Liquids: Not classified
  • Pyrophoric Solids: Not classified
  • Self-heating Substances and Mixtures: Not classified
  • Substances and Mixtures which in contact with water, emit flammable gases: Not classified
  • Oxidizing Liquids: Not classified
  • Oxidizing Solids: Not classified
  • Organic Peroxides: Not classified
  • Corrosive to Metals: Not classified
  • Desensitized Explosives: Not classified

How to read the C2CC Hazard Summary Table

Human Health
Environmental
Other
 
Carcinogenicity
Mutagenicity
Reproductive & Developmental Toxicity
Endocrine Activity / Disruption
Oral Toxicity
Dermal Toxicity
Inhalation Toxicity
Neurotoxicity
Skin, Eye, and Respiratory Corrosion/Irritation
Sensitization of Skin and Airways
Fish Toxicity
Daphnia Toxicity
Algae Toxicity
Terrestrial Toxicity
Persistence
Bioaccumulation
Climatic Relevance
Other (Human Health)
Organohalogens
Toxic Metals
Other (Environmental Health)
Oral
Dermal
Inhalation
-
-
-
G
G
G
-
-
Rationale
No data available.
G
G
G
G
-
-
Y
G
G
G
G
-
G
Rationale
No degradation products of concern were identified for this chemical substance. The available biodegradation results meet the low-concern benchmark and provide sufficient information to indicate this chemical will have low persistence.
G
Rationale
Based on the estimated bioaccumulation factor (BAF) value of 1.1, using Estimation Programs Interface (EPI) Suite models, 1,2-hexanediol has low potential for bioaccumulation in the environment based on the low-concern threshold of less than 1000.
Y
G
Rationale
No data available.
G
G
G
Rationale
No data available.