IUPAC Name: (3-phenoxyphenyl)methyl(1R,3R)-3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropane-1-carboxylate
Empirical Formula: C₂₁H₂₀Cl₂O₃
Molecular Weight: 391.2877g/mol
Surface Tension: 50.5 dyne/cm
Density: 1.293 g/cm³
Flash Point: 159.4 °C
Boiling Point: 465.9 °C at 760 mmHg
Vapour Pressure: 7.41E-09 mmHg at 25°C 
Enthalpy of Vaporization: 72.76 kJ/mol
Systematic Name: 3-phenoxybenzyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate  
SMILES: Cl/C(Cl)=C/C3C(C(=O)OCc2cccc(Oc1ccccc1)c2)C3(C)C
InChI: InChI=1/C21H20Cl2O3/c1-21(2)17(12-18(22)23)19(21)20(24)25-13-14-7-6-10-16(11-14)26-15-8-4-3-5-9-15/h3-12,17,19H,13H2,1-2H3
InChIKey: RLLPVAHGXHCWKJ-UHFFFAOYAS 
Structure of cis-Permethrin (CAS NO.61949-76-6):

 

IARC Cancer Review: Group 3 IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 53 ,1991,p. 329.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Inadequate Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 53 ,1991,p. 329.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human No Available Data IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 53 ,1991,p. 329.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) .

Hazard Codes:F XnN
Risk Statements: 11-38-50/53-65-67-43-20/22 
R11:Highly flammable. 
R38:Irritating to skin. 
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. 
R65:Harmful: may cause lung damage if swallowed. 
R67:Vapours may cause drowsiness and dizziness. 
R43:May cause sensitization by skin contact. 
R20/22:Harmful by inhalation and if swallowed.
Safety Statements: 60-61-62-36/37/39-24-13
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. 
S62:If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. 
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection. 
S24:Avoid contact with skin. 
S13:Keep away from food, drink and animal foodstuffs.
RIDADR UN: 1145 3/PG 2
RTECS GZ:1251540

 cis-Permethrin , its cas register number is 61949-76-6. It also can be called 3-phenoxybenzyl 3-(2,2-dichloroethenyl)-2,2-dimethylcyclopropanecarboxylate .It may cause lung damage if swallowed, and it may cause sensitization by skin contact. Its apours may cause drowsiness and dizziness.  It is hazardous, so the first aid measures and others should be known. cis-Permethrin (CAS NO.61949-76-6) should avoid release to the environment. If swallowed, do not induce vomitting; seek medical advice immediately. Wear suitable protective clothing, gloves and eye/face protection when Contact with it.