MF: C₁₆H₂₂O₄
MW: 278.34
EINECS: 201-557-4
mp：  -35 °C
bp：  340 °C(lit.)
density：  1.043 g/mL at 25 °C(lit.)
vapor density：  9.6 (vs air)
vapor pressure：  1 mm Hg ( 147 °C)
refractive index：  n20/D 1.492(lit.)
Fp：  340 °F
storage temp：  2-8°C
Water Solubility：  Slightly soluble. 0.0013 g/100 mL
FreezingPoint：  -35℃
Merck：  14,3035
BRN：  1914064
Synonyms:ai-3-00283;benzene-1,2-dicarboxylicaciddibutylester;Benzene-o-dicarboxylic acid, di-n-butyl ester;benzene-o-dicarboxylicaciddi-n-butylester; Bufa; caswellno292; Celluflex DPB;celluflexdpb
The structure of  DIBUTYL PHTHALATE is:

                                      

Production of Dibutyl phthalate by direct esterification of n-butanol and phthalic anhydride.

1、RTECS#: CAS# 84-74-2: TI0875000 
2、LD50/LC50: RTECS: CAS# 84-74-2: Inhalation, mouse: LC50 = 25 gm/m3/2H;Inhalation, rat: LC50 = 4250 mg/m3;Oral, mouse: LD50 = 3474 mg/kg;Oral, rat: LD50 = 7499 mg/kg;Skin, rabbit: LD50 = >20 mL/kg;
3、Carcinogenicity: Dibutyl phthalate - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.
4、Other: See actual entry in RTECS for complete information. 
 

Hazard Codes：  T,N,F
Risk Statements：  61-50-62-39/23/24/25-23/24/25-11
Safety Statements：  53-45-61-36/37-16
RIDADR：  UN 3082 9/PG 3
WGK Germany：  2
RTECS：  TI0875000
HazardClass：  9
PackingGroup：  III
HS Code：  29173100
Moderately toxic by intraperitoneal and intravenous routes. Mildly toxic by ingestion. Human systemic eye effects by ingestion, hallucinations, distorted perceptions, nausea or vomiting, and kidney, ureter, or bladder changes. Experimental teratogenic and reproductive effects.

The dibutyl phthalate , with the register number 84-74-2, has other names as ai-3-00283;benzene-1,2-dicarboxylicaciddibutylester;Benzene-o-dicarboxylic acid, di-n-butyl ester;benzene-o-dicarboxylicaciddi-n-butylester;Bufa;caswellno292;Celluflex DPB;celluflexdpb .

The physical properties of this kind of chemcial are as followings: (1)#H bond acceptors:  4    ; (2)#Freely Rotating Bonds:  10  ; (3)Polar Surface Area:  52.6  ; (4)Index of Refraction:  1.499  ; (5)Molar Refractivity:  77.59 cm³  ; (6)Molar Volume:  264.2 cm³  ; (7)Polarizability:  30.76 ×10^-24 cm³  ; (8)Surface Tension:  37.9 dyne/cm  ; (9)Density:  1.053 g/cm³  ; (10)Flash Point:  177.4 °C  ; (11)Enthalpy of Vaporization:  58.02 kJ/mol  ; (12)Boiling Point:  337 °C at 760 mmHg  ; (13)Vapour Pressure:  0.000108 mmHg at 25°C.

This is a kind of colourless oily liquid and it is insoluble in water while soluble in ethanol, aether,  acetone, benzene and other organic solvent. Its product categories are including the followings: phthalates;piperazine derivates;analytical chemistry;environmental endocrine disruptors;functional materials;phthalates (environmental endocrine disruptors);phthalates (plasticizer);plasticizer;aromatics;isotope labeled compounds;miscellaneous reagents;dia - diccosmetics;plasticizers (phthalates);allergens;alpha sort;d;dalphabetic;oeko-tex standard 100;phthalatesmethod specific;volatiles/ semivolatiles.

Being a kind of toxic chemcial, it may at low levels cause damage to health. And it will have danger of very serious irreversible effects through inhalation, or in contact with skin or if swallowed. Then it may cause harm to the unborn child and it also have possible risk of impaired fertility  Besides, it is dangerous for the environment and toxic to aquatic organisms, for this kind of chemicals may present an immediate or delayed danger to one or more components of the environment. What's more, it is highly flammable for it may catch fire in contact with air, only needing brief contact with an ignition source and it has a very low flash point or evolve highly flammable gases in contact with water. 

And you should be very careful while dealing with it. Wear suitable protective clothing and gloves. Avoid exposure - obtain special instructions before use and if in case of accident or if you feel unwell seek medical advice immediately (show the label where possible). Besides, avoid release to the environment and then refer to special instructions/safety data sheet. Then, keep away from sources of ignition - No smoking. If you need more safety informaion, you could refer to the WGK Germany  2.

In addition, you could refer to the following data information to get the molecular structure:
SMILES:O=C(OCCCC)c1ccccc1C(=O)OCCCC

Below are the toxicity information of this kind of chemcial: