Overview
Heneicosanoic acid (CAS 2363-71-5 ) is a saturated C21 straight-chain fatty acid used as a reference standard, specialty emulsifier, and functional lubricant component across food, cosmetic, and industrial formulations.
Its odd-chain carbon structure makes it commercially distinct from even-chain fatty acids, supporting specific analytical and formulation roles that even-chain alternatives cannot fulfill in various applications.
In food and nutrition research, it serves as an internal standard for fatty acid profiling by GC analysis, where its odd-chain status ensures it does not interfere with naturally occurring even-chain lipid peaks.
Cosmetic formulators incorporate it into emollient systems and wax blends to modify texture, spreadability, and film-forming behavior in skin-care and hair-care products for improved performance.
In lubricant formulations, it functions as a boundary lubricant additive or base component in specialty greases where controlled chain length and saturation are required for industrial machinery.
It also supports lipid metabolism research as a biochemical tracer, giving it a niche but consistent demand in life science supply chains and specialized laboratory environments worldwide.
Heneicosanoic acid is supplied as a white to off-white powder or crystalline solid. It is available primarily in research-grade and high-purity analytical grades, with purity specifications typically at 98% or above.
Packaging ranges from small-quantity laboratory units to bulk quantities for industrial formulators. This ensures that both small-scale research and large-scale manufacturing needs are met efficiently.
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Physical Properties
| Melting Point | 75.76 °C |
| Boiling Point | 168-171 °C @ Press: 2 Torr |
| Density | 0.8903 (rough estimate) |
| Appearance | white shiny fluffy crystalline powder |
| Color | White |
| Form | Shiny Fluffy Crystalline Powder |
| Refractive Index | 1.4538 (estimate) |
| Log P | 9.810 (est) |
Safety & Handling
Warning GHS07 Hazard Statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29159000 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 2363-71-5
- EC Number
- 219-113-3
- Mol. Weight
- 326.6
- HS Code
- 29159000
- Category
- Organic Acids