The CAS registry number of Docosahexaenoic acid is 6217-54-5. The IUPAC name is (4Z,7Z,10Z,13Z,16Z,19Z)-docosa-4,7,10,13,16,19-hexaenoic acid. In addition, the molecular formula is C₂₂H₃₂O₂ and the molecular weight is 328.49. It is also called 4-cis,7-cis,10-cis,13-cis,16-cis,19-cis-docosahexaenoic acid. What's more, it is an omega-3 fatty acid and belongs to the classes of Biochemistry; Higher Fatty Acids & Higher Alcohols; Unsaturated Higher Fatty Acids; Fatty Acid Derivatives & Lipids; Glycerols. It should be stored in sealed container which filled with nitrogen, and put them in a cool and dry place

Physical properties about this chemical are: (1)ACD/LogP: 6.78; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 5.81; (4)ACD/LogD (pH 7.4): 4.01; (5)ACD/BCF (pH 5.5): 8976.76; (6)ACD/BCF (pH 7.4): 141.05; (7)ACD/KOC (pH 5.5): 12478.48; (8)ACD/KOC (pH 7.4): 196.07; (9)#H bond acceptors: 2; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 14; (12)Polar Surface Area: 26.3 Å²; (13)Index of Refraction: 1.52; (14)Molar Refractivity: 105.88 cm³; (15)Molar Volume: 347.9 cm³; (16)Polarizability: 41.97 ×10^-24cm³; (17)Surface Tension: 36 dyne/cm; (18)Density: 0.943 g/cm³; (19)Flash Point: 343.4 °C; (20)Enthalpy of Vaporization: 77.28 kJ/mol; (21)Boiling Point: 446.7 °C at 760 mmHg; (22)Vapour Pressure: 3.16E-09 mmHg at 25°C.

Preparation of Docosahexaenoic acid: it is commercially manufactured from microalgae; crypthecodinium cohnii and another of the genus schizochytrium. It is manufactured internally from α-linolenic acid, a shorter omega-3 fatty acid manufactured by plants (and also occurring in animal products as obtained from plants). Moreover, it can be prepared by cis-4,7,10,13,16,19-docosahexaneoic acid ethyl ester. This reaction will need reagents EDTA and Na₂EDTA*2H₂O, and solvents ethanol and H₂O. The reaction time is 2 hours at reaction temperature of 60-65 °C. The yield is about 98%.

Uses of Docosahexaenoic acid: it can be used as a nutritional fortifiersit. And it can be used to treat hypertension, diabetes, menopausal syndrome, Parkinson's disease, asthma and eczema. Moreover, it is actively promoted by manufacturers as a food additive. In addition, it can react with diazomethane to get docosa-4c,7c,10c,13c,16c,19c-hexaenoic acid methyl ester. This reaction will need solvent diethyl ether. The yield is about 100%.

When you are using this chemical, please be cautious about it as the following:
During using it, you should avoid contact with skin and eyes. And do not breathe gas/fumes/vapor/spray (appropriate wording to be specified by the manufacturer).

You can still convert the following datas into molecular structure:
(1)SMILES: O=C(O)CC/C=C/C/C=C/C\C=C/C/C=C/C/C=C/C/C=C/CC
(2)InChI: InChI=1/C22H32O2/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20-21-22(23)24/h3-4,6-7,9-10,12-13,15-16,18-19H,2,5,8,11,14,17,20-21H2,1H3,(H,23,24)/b4-3+,7-6+,10-9+,13-12-,16-15+,19-18+
(3)InChIKey: MBMBGCFOFBJSGT-CHRIZAQABI