IUPAC Name: (2E,4E)-hexa-2,4-dienoic acid 
Empirical Formula: C₆H₈O₂
Molecular Weight: 112.1265
EINECS: 203-768-7 
Structure of Sorbic acid (CAS NO.110-44-1):

Index of Refraction: 1.487
Molar Refractivity: 31.52 cm³
Molar Volume: 109.4 cm³
Polarizability: 12.49×10^-24cm³
Surface Tension: 35.4 dyne/cm
Density: 1.024 g/cm³
Flash Point: 139.9 °C
Enthalpy of Vaporization: 51.74 kJ/mol 
Melting Point: 132-135 °C(lit.)
Boiling Point: 233 °C at 760 mmHg
Vapour Pressure: 0.02 mmHg at 25°C 
Storage temp: 2-8°C
Solubility: ethanol: 0.1 g/mL, clear
Water Solubility: 1.6 g/L (20 ºC) 
Stability: Stability Material saturated with this acid may ignite spontaneously. Incompatible with strong oxidizing agents. May be light sensitive. 
Product Categories: FOOD ADDITIVES;Food and Feed Additive;Food & Feed ADDITIVES;Fatty & Aliphatic Acids, Esters, Alcohols & Derivatives;Organic acids 
Canonical SMILES: CC=CC=CC(=O)O
Isomeric SMILES: C/C=C/C=C/C(=O)O
InChI: InChI=1S/C6H8O2/c1-2-3-4-5-6(7)8/h2-5H,1H3,(H,7,8)/b3-2+,5-4+
InChIKey: WSWCOQWTEOXDQX-MQQKCMAXSA-N

SORBIC ACID was first isolated from the unripe berries of the Rowan (Sorbus aucuparia), hence its name.

 Sorbic acid (CAS NO.110-44-1) and its mineral salts, such as sodium sorbate, potassium sorbate and calcium sorbate, are antimicrobial agents often used as preservatives in food and drinks to prevent the growth of mold, yeast and fungi.
 Sorbic acid (CAS NO.110-44-1) is also used as a bio descaling agent.

Reported in EPA TSCA Inventory.

Moderately toxic by intraperitoneal and subcutaneous routes. Mildly toxic by ingestion. Experimental reproductive effects. A severe human and experimental skin irritant. Questionable carcinogen with experimental tumorigenic data. Mutation data reported. Combustible when exposed to heat or flame; can react with oxidizing materials. To fight fire, use water. When heated to decomposition it emits acrid smoke and irritating fumes.
Hazard Codes:  Xi
The Risk Statements information of Sorbic acid :
36/37/38:  Irritating to eyes, respiratory system and skin 
36/38:  Irritating to eyes and skin 
The Safety Statements information of Sorbic acid :
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice 
36:  Wear suitable protective clothing 
24/25:  Avoid contact with skin and eyes 
WGK Germany:1

  Sorbic acid , its cas register number is 110-44-1. It also can be called (E,E)-2,4-Hexadienoic acid ; 1,3-Pentadiene-1-carboxylic acid, (E,E)- ; 2,4-Hexadienoic acid, (E,E)- ; 2-Propenylacrylic acid ; 2E,4E-Hexadienoic acid ; Acetic acid, (2-butenylidene)- ; Acetic acid, crotylidene- ; EPA Pesticide Chemical Code 075901 ; Hexadienoic acid ; Kyselina 1,3-pentadien-1-karboxylova ; Kyselina sorbova ; Panosorb ; Sorbistat ; alpha-trans-gamma-trans-Sorbic acid ; trans,trans-Sorbic acid ; trans-trans-2,4-Hexadienoic acid . Sorbic acid (CAS NO.110-44-1) is a white powder or crystals.