The 1-Chlorocarbonyl-1-methylethyl acetate, with the CAS registry number 40635-66-3, is also known as Acetic acid 1-chlorocarbonyl-1-methylethyl ester. It belongs to the product category of Pharmaceutical Intermediates. Its EINECS number is 255-016-2. This chemical's molecular formula is C₆H₉ClO₃ and molecular weight is 164.59. What's more, its systematic name is 1-Chloro-2-methyl-1-oxo-2-propanyl acetate. This chemical should be sealed and stored in a cool and dry place. 

Physical properties of 1-Chlorocarbonyl-1-methylethyl acetate are: (1)ACD/LogP: 1.198; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 1.20; (4)ACD/LogD (pH 7.4): 1.20; (5)ACD/BCF (pH 5.5): 4.79; (6)ACD/BCF (pH 7.4): 4.79; (7)ACD/KOC (pH 5.5): 106.82; (8)ACD/KOC (pH 7.4): 106.82; (9)#H bond acceptors: 1; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 17.07 Å²; (13)Index of Refraction: 1.514; (14)Molar Refractivity: 32.993 cm³; (15)Molar Volume: 109.519 cm³; (16)Polarizability: 13.08×10^-24cm³; (17)Surface Tension: 35.1 dyne/cm; (18)Density: 1.297 g/cm³; (19)Flash Point: 64.276 °C; (20)Enthalpy of Vaporization: 40.501 kJ/mol; (21)Boiling Point: 168.572 °C at 760 mmHg; (22)Vapour Pressure: 1.6 mmHg at 25°C.

When you are using this chemical, please be cautious about it as the following:
This chemical can react violently with water and can cause burns. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. When using it, you need wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell, you should seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(1)SMILES: O=C(Cl)C(OC(=O)C)(C)C
(2)Std. InChI: InChI=1S/C6H9ClO3/c1-4(8)10-6(2,3)5(7)9/h1-3H3
(3)Std. InChIKey: RBTCRFLJLUNCLL-UHFFFAOYSA-N