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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 231Generated: October 27, 2026

5,8,11,14-Eicosatetraenoic acid, (5Z,8Z,11Z,14Z)-

ARA · Arachidonate · Arachidonic · 5,8,11,14-EICOSATETRAENOIC ACID · icosa-5,8,11,14-tetraenoic acid · Arachidonic Acid (peroxide free) · (5Z,8Z,11Z,14Z)-Icosa-5,8,11,14-tetraenoic acid · 20:4n-6

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5,8,11,14-Eicosatetraenoic acid, (5Z,8Z,11Z,14Z)- molecular structure

Identifiers & Physical Properties

CAS No.506-32-1
Molecular formulaC20H32O2
Average molar mass304.5 g/mol
Monoisotopic mass304.24023026 g/mol
SMILESCCCCCC=CCC=CCC=CCC=CCCCC(=O)O
InChIKeyYZXBAPSDXZZRGB-UHFFFAOYSA-N
PubChem CID231
DTXSIDDTXSID50859424

Chemical & Physical Properties

XLogP6.3
Topological polar surface area37.3
Hydrogen bond donors1
Hydrogen bond acceptors2
Rotatable bonds14
Heavy atoms22
Formal charge0
Complexity362
Melting point-49 °C (lit.)
Boiling point169-171 °C/0.15 mmHg (lit.)
Density0.922 g/mL at 25 °C (lit.)
Refractive indexn20/D 1.4872(lit.)
Flash point>230 °F
Storage conditions2-8°C
Solubilityethanol: ≥10 mg/mLPRACTICALLY INSOLUBLE
Physical stateoil
pKa (acidity coefficient)4.75±0.10(Predicted)
Colorcolorless to light yellow
Biological sourcesynthetic
Merck14,765
BRN1713889
Concentration1 mCi/ml
SolventEthanol under argon
Specific Activity200-240 Ci/mmol
StabilityLight Sensitive, Temperature Sensitive
Major applicationsfood and beverages
Cosmetics Ingredients FunctionsSKIN CONDITIONINGSKIN CONDITIONING - EMOLLIENT
Cosmetic Ingredient Review (CIR)Arachidonic acid (506-32-1)
InChI1S/C20H32O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20(21)22/h6-7,9-10,12-13,15-16H,2-5,8,11,14,17-19H2,1H3,(H,21,22)/b7-6-,10-9-,13-12-,16-15-
InChIKeyYZXBAPSDXZZRGB-DOFZRALJSA-N
SMILESOC(CCC/C=C\C/C=C\C/C=C\C/C=C\CCCCC)=O
LogP (partition coefficient)6.99
CAS DataBase Reference506-32-1(CAS DataBase Reference)
EWG's Food Scores1
FDA UNII27YG812J1I
NIST Chemistry ReferenceArachidonic acid(506-32-1)
UNSPSC Code85151701
NACRESNA.77
GHS pictogramGHS02,GHS07
Signal wordDanger
GHS hazard statementsH225-H319
GHS precautionary statementsP210-P233-P240-P241-P242-P305+P351+P338
Risk statements (R)19
Safety statements (S)24/25-19
UN transport numberUN1170 - class 3 - PG 2 - Ethanol
Water hazard class (WGK)3
RTECS numberCE6675000
F8-10-23
Customs code29161900
Storage class10 - Combustible liquids
Hazard classEye Irrit. 2Skin Irrit. 2
Toxicitydns-mus:mmr 10 mg/L CRNGDP 5,1123,84

Safety & Regulations

Regulatory information5,8,11,14-Eicosatetraenoic acid, (5Z,8Z,11Z,14Z)-: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.
F8-10-23
Water hazard class (WGK)3
RTECS numberCE6675000
UN transport numberUN1170 - class 3 - PG 2 - Ethanol
Customs code29161900
Toxicitydns-mus:mmr 10 mg/L CRNGDP 5,1123,84
Risk statements (R)19
Signal wordDanger
GHS pictogramGHS02,GHS07
Safety statements (S)24/25-19
Storage class10 - Combustible liquids
GHS hazard statementsH225-H319
Hazard classEye Irrit. 2Skin Irrit. 2
GHS precautionary statementsP210-P233-P240-P241-P242-P305+P351+P338

Applications & Uses

Description

Arachidonic acid belongs to a kind of polyunsaturated omega-6 fatty acid, which is highly biologically relevant. It is abundantly distributed in brain, muscles and liver. It is the precursor for all prostaglandins, thromboxanes, and leukotrienes. Most cellular arachidonic acid is esterified in the membrane phospholipids. It is an important second messenger of cellular signalling participating in the regulation of signaling enzymes including PLC-γ, PLC-δ, and PKC-α, -β, and -γ isoforms. In addition, arachidonic acid acts as key inflammatory intermediate as well as avasodilator. Generally, the body can synthesize the arachidonic acid through linoleic acid. However, upon linoleic acid deficiency, it is necessary to supplement arachidonic acid from the diets. Food sources of arachidonic acid include meat, eggs and some fishes. Alternatively, we can also have arachidonic acid supplements.

Description

Arachidonic acid (AA, sometimes ARA) is a polyunsaturated omega-6 fatty acid 20:4(ω-6). It is the counterpart to the saturated arachidic acid found in peanut oil, (L. arachis – peanut.).

Uses

An unsaturated omega-6 fatty acid constituent of the phospholipids of cell membranes

Uses

arachidonic acid is an ingredient with skin-smoothing, emollient, and healing properties. Arachidonic acid is an omega-6 essential fatty acid naturally occurring in the skin and considered critical for appropriate skin metabolism. It is a constituent of vitamin F.

Uses

Arachidonic Acid is an essential fatty acid and a precursor in the biosynthesis of prostaglandins, thromboxanes, and leukotrienes. Arachidonic Acid occurs in liver, brain, glandular organs, and depot fats of animals, in small amounts in human depot fats, and Arachidonic Acid is also a constituent of animal phosphatides.

General Description

A Certified Spiking Solution suitable for use in mass spectrometry-based fatty acid testing applications such as assessment of cardiovascular disease risk and fatty acid deficiency, and detection and quantification of arachidonic acid in nutraceuticals and dietary supplements. Arachidonic acid (cis-5,8,11,14), sometimes referred to as AA or ARA, is a polyunsaturated omega-6 fatty acid. Studies suggests that ARA as well as other fatty acids can serve as biomarkers for cardiovascular disease, and nutritional and metabolic disorders.