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DDT

DDT structure

CAS No:
50-29-3
Formula:
C14H9Cl5
Chemical Name:
DDT
Synonyms:
Benzene,1,1′-(2,2,2-trichloroethylidene)bis[4-chloro-;Ethane,1,1,1-trichloro-2,2-bis(p-chlorophenyl)-;1,1′-(2,2,2-Trichloroethylidene)bis[4-chlorobenzene];Arkotine;α,α-Bis(p-chlorophenyl)-β,β,β-trichlorethane;2,2-Bis(p-chlorophenyl)-1,1,1-trichloroethane;Chlorophenothane;DDT;p,p′-DDT;4,4′-Dichlorodiphenyltrichloroethane;Dicophane;p,p′-Dichlorodiphenyltrichloroethane;Estonate;Gesafid;Gesarol;Neocid;Pentachlorin;Trichlorobis(4′-chlorophenyl)ethane;1,1,1-Trichloro-2,2-bis(p-chlorophenyl)ethane;Zerdane;Agritan;Azotox M 33;Citox;4,4′-DDT;Dykol;Clofenotan;ENT-1506;Ethane,1,1,1-trichloro-2,2-bis(4-chlorophenyl)-;1,1-Bis(p-chlorophenyl)-2,2,2-trichloroethane;Detoxan;Clofenotane;Aavero-extra;Chlorphenothan;Deoval;Mutoxan;PEB1;Penticidum;Dodat;Bosan supra;Bovidermol;Ivoran;Chlorphenotoxum;Parachlorocidum;Dibovin;Neocidol (solid);Tafidex;2,2,2-Trichloro-1,1-bis(4-chlorophenyl)ethane;p,p′-Dichlorodiphenyltrichloromethylmethane;Neocidol;1,1-Bis(4-chlorophenyl)-2,2,2-trichloroethane;Hildit;Benzochloryl;1,1,1-Trichloro-2,2-di(p-chlorophenyl)ethane;Detox (pesticide);Gesarex;Gesapon;Guesapon;Dicophaner;NSC 8939;o,p′-1,1,1-Trichloro-2-2,2-bis(p-chlorophenyl)ethane;FWJ;Dichlorodiphenyltrichloroethane;1,1,1-Trichloro-2-2,2-bis(p-chlorophenyl)ethane;2,2-Bis(4-chlorophenyl)-1,1,1-trichloroethane;Detox;Para-Para DDT;1081843-15-3
Categories:
Agrochemicals > Insecticides

Description

The technical p,p′-DDT is a waxy solid but in its pure form appears as colourless crystals. It is a mixture of three isomers, namely, p,p′-DDT isomer (about ca. 85%); o,p′-DDT; and o,o′-DDT (in smaller levels). DDT is very soluble in cyclohexanone, dioxane, benzene, xylene, trichloroethylene, dichloromethane, acetone, chloroform, diethyl ether, ethanol, and methanol. DDT was extensively used during World War II among the Allied troops and certain civilian populations to control insect typhus

DDT Basic Attributes

Molecular Weight：

354.49

Exact Mass：

354.49

EC Number：

200-024-3

HScode：

2903920000

Characteristics

PSA：

XLogP3：

6.36

Appearance：

Ddt and metabolites appears as a colorless crystalline solid or white to off-white powder. Odorless to slightly aromatic. Insoluble in water. Used as an insecticide.

Density：

0.98-0.99 g/cm³

Melting Point：

108.5 °C

Boiling Point：

260 °C

Flash Point：

72 °C

Refractive Index：

1.609

Water Solubility：

In g/L: Benzyl benzoate (420), carbon tetrachloride(450),chlorobenzene(740),cyclohexanone(1,160),gasoline(100),isopropanol(30),kerosene(80–100),morpholine(750),peanut oil(110),pine oil 100–160),tetralin 610),tributyl phosphate(500)(Windholz et al., 1983). 95.4 g/kg in triolein at 25°C (Chiou and Manes,1986)；In wt%: acetone(21.2 at 0°C, 27.3 at 7.2°C, 40.3 at 24.0°C, 59.0 at 48.0°C); benzene(6.8 at 0°C, 27.1 at 7.2°C, 44.0 at 24.0°C, 59.3 at 48.0°C)

Storage Conditions：

APPROX 4°C

Vapor Pressure：

0.5 at 25 °C (extrapolated from vapor pressures determined at higher temperatures, Tesconi andYalkowsky, 1998)

Toxicity：

Oral-rat LD50: 87 mg/kg; Oral-Mouse LD50: 135 mg/kg

Flammability characteristics：

Thermal decomposition of toxic chloride gas

Explosive limit：

Contact with strong oxidizers may cause fire and explosion hazard.

Odor：

Odorless or with slight aromatic odor

Safety Information

Packing level：

III

Hazard category：

6.1(b)

Transport codes：

UN 2811 6.1/PG 3

wgk germany：

hazard class code：

25-40-48/25-50/53-36/37/38-11-39/23/24/25-23/24/25-52/53-24-67-65-38

safety instructions：

22-36/37-45-60-61-36-33-26-16-7-62

RTECS Number：

KJ3325000

Marks：

T,N,Xi,F,Xn

Storage features：

The warehouse is ventilated, low temperature and dry; stored and transported separately from food materials

Stability/Shelf Life：

Stable. Combustible. Incompatible with strong oxidizing agents, iron and aluminium and their salts, alkalies.

Precautionary statement(s)：

P210-P260-P273-P280-P301 + P310-P311

Hazard Statements：

H225-H301 + H311 + H331-H370-H410

Toxicity

Toxicity class：

highly toxic

DDT Use and Manufacturing

Methods of Manufacturing

Derived from the condensation of trichloroacetaldehyde and benzene monochloride in the presence of fuming sulfuric acid. Put trichloroacetaldehyde and chlorobenzene in the condensation pot, and add fuming sulfuric acid dropwise with stirring. The condensed material is allowed to stand and separate, and the waste acid is put away. The acidic DDT chlorobenzene solution is washed with hot water and then with sodium hydroxide solution. The chlorobenzene is then recovered by distillation, and the residue, that is, molten DDT, is placed in a drum crystallizer and cooled and crystallized to obtain a finished product. The condensation reaction is carried out at 10-23°C, and the waste acid (containing parachlorobenzene sulfonic acid generated by the side reaction) generated by the condensation reaction is added to the condensation or the side reaction is suppressed, the amount of parachlorobenzene sulfonic acid is reduced, and sulfuric acid is added dropwise The time is about 2.5h. The content of the first-class DDT raw powder is ≥74.0%.

Uses

Contact insecticide.

Computed Properties

Molecular Weight:354.5
XLogP3:6.9
Rotatable Bond Count:2
Exact Mass:353.911739
Monoisotopic Mass:351.914689
Heavy Atom Count:19
Complexity:250
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes

Material

Chlorobenzene

Sulfuric acid