2,4-Dichlorophenoxyacetic acid

Superiority:

Product Name:    2,4-Dichlorophenoxyacetic acid

CAS:    94-75-7
MF:    C8H6Cl2O3
MW:    221.04
EINECS:    202-361-1

Mol File:    94-75-7.mol
2,4-Dichlorophenoxyacetic acid Structure
2,4-Dichlorophenoxyacetic acid Chemical Properties
Melting point     136-140 °C (lit.)
Boiling point     160 °C (0.4 mmHg)
density     1.563
vapor pressure     0.4 mm Hg ( 160 °C)
refractive index     1.5000 (estimate)
Fp     160°C/0.4mm
storage temp.     APPROX 4°C
solubility     Soluble in organic solvents (ethanol, acetone, dioxane)
pka    pK1:2.64 (25°C)
form     crystalline
color     off-white to tan
PH Range    Acidic
Odor Threshold    3.13 ppm
Water Solubility     Slightly soluble. Decomposes. 0.0890 g/100 mL
Merck     14,2796
BRN     1214242
Henry's Law Constant    6.72 and 0.84 x 10-5 atm m3/mol were reported at pH values of 1 and 7, respectively (wetted-wall column, Rice et al., 1997a)
Exposure limits    NIOSH REL: TWA 10 mg/m3, IDLH 100 mg/m3; OSHA PEL: TWA 10 mg/m3; ACGIH TLV: TWA 10 mg/m3.
Stability:    Stable, but moisture-sensitive and may be light-sensitive. Incompatible with strong oxidizing agents, corrodes many metals. Decomposes in water.
CAS DataBase Reference    94-75-7(CAS DataBase Reference)
IARC    2B (Vol. 113) 2018
NIST Chemistry Reference    (2,4-Dichlorophenoxy)acetic acid(94-75-7)
EPA Substance Registry System    2,4-D (94-75-7)
Safety Information
Hazard Codes     Xn,Xi,T,F
Risk Statements     22-37-41-43-52/53-39/23/24/25-23/24/25-36/37/38-11-36-20/21/22-67-66
Safety Statements     24/25-26-36/37/39-46-61-2-45-36/37-27-16-7-9
RIDADR     UN 3077 9/PG 3
WGK Germany     2
RTECS     AG6825000
Autoignition Temperature    > 180 °C
TSCA     Yes
HazardClass     6.1
PackingGroup     III
HS Code     29189090
Hazardous Substances Data    94-75-7(Hazardous Substances Data)
Toxicity    LD50 (oral): rat [free] 375 mg/kg, [-Na] 666-805 mg/kg.