542-42-7

Basic information

• Product Name: CALCIUM PALMITATE
• Synonyms: calciumdipalmitate;Hexadecanoicacid,calciumsalt;CALCIUM PALMITATE;Palmitate (calcium salt);OMMAWEGMHLHTAV-UHFFFAOYSA-N
• CAS NO: 542-42-7
• Molecular Formula: 2C₁₆H₃₁O₂*Ca
• Molecular Weight: 550.91
• EINECS: 208-811-3
• Mol File: 542-42-7.mol
• Article Data: 2

Chemical Properties

• Melting Point: decomposes above 155℃ [MER06]
• Boiling Point: 340.6 °C at 760 mmHg
• Flash Point: 154.1 °C
• Appearance: /
• Vapor Pressure: 3.28E-05mmHg at 25°C
• Water Solubility: insoluble H2O, alcohol, ether, acetone; slightly soluble benzene [MER06]
• CAS DataBase Reference: CALCIUM PALMITATE(CAS DataBase Reference)
• NIST Chemistry Reference: CALCIUM PALMITATE(542-42-7)
• EPA Substance Registry System: CALCIUM PALMITATE(542-42-7)

Safety Data

• Hazardous Substances Data: 542-42-7(Hazardous Substances Data)

Usage

Description

Saturated fatty acids are synthesized by both plants and animals from acetyl coenzyme A as a form of long-term energy storage. Saturated fatty acids are synthesized by both plants and animals from acetyl coenzyme A as a form of long-term energy storage. Palmitic acid is a common 16-carbon saturated fat that represents 10-20% of the normal dietary fat intake. Palmitic acid also makes up approximately 25% of the total plasma fatty acids in plasma lipoproteins. Saturated free fatty acids induce the expression of cyclooxygenase 2, and after protein acylation, are used to confer lipid anchoring to a variety of signaling molecules. Palmitate is the salt (in this case calcium) of palmitic acid. It is this anion that is observed at physiological pH. Calcium palmitate is one of the major components of gallstones.

Chemical Properties

white or pale yellow powder(s); used for waterproofing, as a thickener for lubricating oils [HAW93] [MER06]

Uses

Thickening lubricating oils; waterproofing fabrics and lubricating greases; as corrosion inhibitor in halohydrocarbons.

InChI:InChI=1/2C16H32O2.Ca/c2*1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16(17)18;/h2*2-15H2,1H3,(H,17,18);/q;;+2/p-2

Upstream product

• 57-10-3 1-hexadecylcarboxylic acid 

Downstream Products

• 502-73-8 palmitone 

Relevant articles and documents

Characterisation of metal carboxylates by Raman and infrared spectroscopy in works of art

This work introduces the complementary use of μ-Raman and μ-Fourier transform infrared (IR) spectroscopy for the detection of specific carbon chains and cations for the identification of metal carboxylates within oil paint microsamples. Metal carboxylates (metal soaps) form naturally when free fatty acids react with metal cations and may also be found as additives or degradation products. Twenty-two metal carboxylates were synthesised, and their spectra assembled in a reference database. Metal salts of cations commonly present in oil paintings were used, including lead, zinc, calcium, cadmium, copper and manganese. The fatty acids selected were the saturated acids palmitic (C1 6:0) and stearic (C18:0) and the polyunsaturated oleic acid (C1 8:1). Azelaic acid (C9 diacid), a product resulting from autoxidation of polyunsaturated acids, was also included. Metal carboxylates were characterised by Raman and IR spectroscopy, and their structures were confirmed by X-ray diffraction. Raman and IR spectroscopy proved to be complementary techniques for a full identification of the metal carboxylates in complex aged paint. Raman enables the differentiation of the carbon chain length in the C-C stretching region (1120-1040 cm-1), and IR distinguishes the metal cation in the COO- stretching absorption region (1650-1380cm-1). Principal component analysis was applied to the spectra in order to facilitate a fast and accurate method to discriminate between the different metal carboxylates and to aide in their identification. Finally, spectra from case studies were successfully projected in the principal component analysis models built, enabling a higher confidence level for the identification of copper palmitate and copper azelate in two 19th-century Portuguese oil paintings.