Molecular Formula: C₁₈H₂₄O₆
Molar mass: 336.3796 g/mol
EINECS: 201-624-8
Density: 1.118 g/cm³
Flash Point: 185.5 °C
Index of Refraction: 1.501
Boiling Point: 428.4 °C at 760 mmHg
Vapour Pressure: 1.52E-07 mmHg at 25°C
Product categories: Functional Materials;Plasticizer;Hydroxycarboxylic Acid Esters
Structure of Butyl carbobutoxymethyl phthalate (85-70-1):
       
XLogP3-AA: 4.6
H-Bond Donor: 0
H-Bond Acceptor: 6
Systematic Name: O2-(2-Butoxy-2-oxo-ethyl) O1-butyl benzene-1,2-dicarboxylate 
SMILES: O=C(OCCCC)c1ccccc1C(=O)OCC(=O)OCCCC 
InChI: InChI=1/C18H24O6/c1-3-5-11-22-16(19)13-24-18(21)15-10-8-7-9-14(15)17(20)23-12-6-4-2/h7-10H,3-6,11-13H2,1-2H3 
InChIKey: GOJCZVPJCKEBQV-UHFFFAOYAW 
Std. InChI: InChI=1S/C18H24O6/c1-3-5-11-22-16(19)13-24-18(21)15-10-8-7-9-14(15)17(20)23-12-6-4-2/h7-10H,3-6,11-13H2,1-2H3 
Std. InChIKey: GOJCZVPJCKEBQV-UHFFFAOYSA-N

Carcinogenicity of Butyl carbobutoxymethyl phthalate (85-70-1) hasn't been listed as a carcinogen by NTP, IARC,ACGIH, or CA Prop 65. And its toxicological properties have not been fully investigated.You can see actual entry in RTECS for complete information.

Reported in EPA TSCA Inventory.

Mildly toxic via intraperitoneal route. Experimental teratogenic and reproductive effects. Mutation data reported. An eye irritant. When heated to decomposition it emits acrid and irritating fumes.
 

Hazard Codes: N,T
Risk Statements:
51:  Toxic to aquatic organisms
61:  May cause harm to the unborn child
62:  Possible risk of impaired fertility
Safety Statements:
45:  In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
53:  Avoid exposure - obtain special instruction before use
61:  Avoid release to the environment. Refer to special instructions safety data sheet

 Butyl carbobutoxymethyl phthalate (85-70-1) also can be called Butyl phthalyl butyl glycolate ; 2-Butoxy-2-oxoethyl butyl phthalate ; 2-butoxy-2-oxoethyl butyl benzene-1,2-dicarboxylate and 1,2-benzenedicarboxylic acid, 2-butoxy-2-oxoethyl butyl ester .It is hazardous,so the first aid measures and others should be known.Such as: When on the skin: first,should  flush skin with plenty of water immediatelyfor at least 15 minutes while removing contaminated clothing. Secondly,Get shoesmedical aid . Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.Then get medical aid soon.While ,it's Inhaled: Remove from exposure and move to fresh air immediately.Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product : Wash mouth out with water,and get medical aid immediately.Notes to physician: Treat supportively and symptomatically.
In addition, Butyl carbobutoxymethyl phthalate (85-70-1) could stabilize existence.It is not compatible with strong oxidizing agents, and you must not take it with incompatible materials.And also prevent it to broken down into hazardous decomposition products: carbon dioxide, carbon monoxide.