The Hexanedioic acid,1-methyl ester with the CAS registry number 627-91-8 and EINECS registry number 211-019-0 is also called Methyl 5-carboxypentanoate. The IUPAC name is 6-methoxy-6-oxohexanoic acid. It is a kind of clear colorless liquid and should be stored at 2-8°C. And the molecular formula is C₇H₁₂O₄ and the molecular weight is 160.17. What's more, it should be stored in a cool, ventilated and dry place. The storage place must stay away from oxidant.

The properties about this chemical are: (1)ACD/LogP: 0.50; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -0.37; (4)ACD/LogD (pH 7.4): -2.18; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 5.95; (8)ACD/KOC (pH 7.4): 1; (9)#H bond acceptors: 4; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 6; (12)Polar Surface Area: 52.6 Å²; (13)Index of Refraction: 1.444; (14)Molar Refractivity: 37.81 cm³; (15)Molar Volume: 142.1 cm³; (16)Polarizability: 14.9×10^-24cm³; (17)Surface Tension: 39.8 dyne/cm; (18)Density: 1.126 g/cm³; (19)Flash Point: 107.9 °C; (20)Enthalpy of Vaporization: 58.43 kJ/mol; (21)Boiling Point: 291.6 °C at 760 mmHg; (22)Vapour Pressure: 0.000479 mmHg at 25°C.

Preparation of Hexanedioic acid,1-methyl ester: it can be prepared by methanol and hexanedioic acid. The reaction will need reagent acid and the yield is about 32%.

Uses of Hexanedioic acid,1-methyl ester:  It can be used as annexing agent of lubricant and senior fuel and solvent of emulsifier products and spices. It also can be used in compounding advanced surface active agent. And it can be used to produce 5-chlorocarbonyl-pentanoic acid methyl ester. This reaction will need reagent oxalyl chloride. The reaction time is 2 hours with heating and the yield is about 94%.

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When you are using this chemical, please be cautious about it as the following:
It irritates to eyes, respiratory system and skin. Therefore, you should wear suitable protective clothing, gloves and eye/face protection to avoid contacting it with skin and eyes. In case of contacting with eyes, rinse immediately with plenty of water and seek medical advice. If anarchic license, do not put this material into surroundings.

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: O=C(O)CCCCC(=O)OC
(2)InChI: InChI=1/C7H12O4/c1-11-7(10)5-3-2-4-6(8)9/h2-5H2,1H3,(H,8,9)
(3)InChIKey: UOBSVARXACCLLH-UHFFFAOYAI