IUPAC Name: 5-[2-(2-Butoxyethoxy)ethoxymethyl]-6-propyl-1,3-benzodioxole 
Empirical Formula: C₁₉H₃₀O₅
Molecular Weight: 338.4385 
Index of Refraction: 1.502
Molar Refractivity: 93.81 cm³
Molar Volume: 317.3 cm³
Surface Tension: 38.9 dyne/cm
Density: 1.066 g/cm³
Flash Point: 165.3 °C
Enthalpy of Vaporization: 62.12 kJ/mol
Boiling Point: 396.2 °C at 760 mmHg
Vapour Pressure: 3.98E-06 mmHg at 25 °C
Appearance:  Light Yellow Liquid
EINECS: 200-076-7 
storage temp.: 0-6 °C
Water Solubility: <0.1 g/100 mL at 18 ºC
Stability: Stable. Combustible. Incompatible with oxidizing agents.
Product Categories: Intermediates & Fine Chemicals; Pharmaceuticals
Classification Code of Piperonyl butoxide (CAS NO.51-03-6): Agricultural Chemical; Insect attractant, repellent and chemosterilant; Insecticide; Mutation data; Pesticide synergists; Pesticides; Reproductive Effect; Tumor data

 Piperonyl butoxide (PBO) is a pesticide synergist, when added to insecticide mixtures, typically pyrethrin, pyrethroid, and carbamate insecticides, their potency is increased considerably.
 Piperonyl butoxide is a potent cytochrome P450 and non-specific esterase inhibitor.

Hazard Codes: N,T
Risk Statements: 50/53-51/53-24 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R24:Toxic in contact with skin.
Safety Statements: 60-61-45-36/37/39-28A 
S60:This material and its container must be disposed of as hazardous waste. 
S61:Avoid release to the environment. Refer to special instructions / safety data sheets. 
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S28:After contact with skin, wash immediately with plenty of soap-suds.
RIDADR: UN 3082 9/PG 3
WGK Germany: 3
RTECS: XS8050000
HazardClass: 6.1(b)
PackingGroup: III

 Piperonyl butoxide (CAS NO.51-03-6), its Synonyms are 1,3-Benzodioxole, 5-((2-(2-butoxyethoxy)ethoxy)methyl)-6-propyl- ; 2-(2-Butoxyethoxy)ethyl 6-propylpiperonyl ether ; 3,4-Methylendioxy-6-propylbenzyl-n-butyl-diaethylenglykolaether ; 3,4-Methylenedioxy-6-propylbenzyl n-butyl diethyleneglycol ether ; 3,4-Methylenedioxy-6-propylbenzyl n-butyldiethyleneglycol ether ; 3,4-Methylenedioxy-6-propylbenzyl-n-butyl-diaethylenglykolaether ; 5-(2-(2-Butoxyethoxy)ethoxymethyl)-6-propyl-1,3-benzodioxole ; 5-Propyl-4-(2,5,8-trioxa-dodecyl)-1,3-benzodioxol ; 5-Propyl-4-(2,5,8-trioxa-dodecyl)-1,3-benzodioxol [German] ; 6-(Propylpiperonyl)-butyl carbityl ether ; 6-(Propylpiperonyl)butylcarbityl ether ; 6-Propylpiperonyl butyl diethylene glycol ether .