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. Its IUPAC name is octadecanoic acid and its formula is CH3(CH2)16CO2H. 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.