57-11-4
Product Name:
Stearic acid
Formula:
C18H36O2
Synonyms:
Stearic acid;Octadecanoic acid;STA;C18:0;Cetylacetic acid
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Stearic acid is a white solid with a mild odor. Floats on water. (USCG, 1999) |
|---|---|
| Color/Form | Monoclinic leaflets from alcohol |
| Odor | Slight odor suggesting tallow |
| Taste | Taste suggesting tallow |
| Boiling Point | 721 °F at 760 mmHg (NTP, 1992) |
| Melting Point | 156.7 °F (NTP, 1992) |
| Flash Point | 385 °F (NTP, 1992) |
| Solubility | 1 to 10 mg/mL at 73 °F (NTP, 1992) |
| Density | 0.86 at 68 °F (USCG, 1999) - Less dense than water; will float |
| Vapor Density | 9.8 (NTP, 1992) - Heavier than air; will sink (Relative to Air) |
| Vapor Pressure | 1 mmHg at 344.7 °F ; 5 mmHg at 408.2 °F (NTP, 1992) |
| LogP | 8.23 |
| Stability/Shelf Life | Stable under recommended storage conditions. |
| Autoignition Temperature | 743 °F (USCG, 1999) |
| Decomposition | Decomposes at boiling point of 360 °C at 1 mm Hg. |
| Viscosity | 9.87 mPa.sec (cP) at 70 °C |
| Heat of Combustion | -11,342.4 kJ/mol |
| Ionization Efficiency | Positive |
| Odor Threshold | Odor Threshold Low: 20.0 [mmHg] Odor threshold (detection) = 20 ppm |
| Refractive Index | Index of refraction: 1.4299 at 80 °C |
| Collision Cross Section | 176.67 Ų [M-H]- [CCS Type: DT; Buffer gas: N2; Sample Type: Human bronchoalveolar lavage fluid (BALF); Dataset: Unambiguous Lipids] |
| Kovats Retention Index | 2187 2174 2139 2142 2138.54 2137 2175 2179 2161 2170 2192 2180 2143 2187 2139 2153 2137 2137 2137 2152 2140 2142 2155 2174 366.9 |
| Other Experimental Properties | Does not congeal below 54 °C. Slowly volatilizes at 90 to 100 °C |
| Chemical Classes | Lipids -> Unambiguous Lipids |
SAFETY INFORMATION
| Signal word | Warning |
|---|---|
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up. |
COMPUTED DESCRIPTORS
| Molecular Weight | 284.5 g/mol |
|---|---|
| XLogP3 | 7.4 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 2 |
| Rotatable Bond Count | 16 |
| Exact Mass | 284.271530387 g/mol |
| Monoisotopic Mass | 284.271530387 g/mol |
| Topological Polar Surface Area | 37.3 Ų |
| Heavy Atom Count | 20 |
| Formal Charge | 0 |
| Complexity | 202 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Stearic acid is a saturated fatty acid with an 18-carbon chain. It is present in animal fats and oils and in some kinds of vegetable oils in the form of glycerides. It appears as a white, waxy, solid substance, often crystalline in structure. Stearic acid is mainly used in the production of detergents, soaps, and cosmetics such as shampoos and shaving cream products.