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Diazinon

Product Name
Diazinon
CAS No.
333-41-5
Chemical Name
Diazinon
Synonyms
Anti;Diazinone;Diazide;BASUDIN;NEOCIDOL;dimpylate;g301;Dicid;dyzol;G 301
CBNumber
CB7702086
Molecular Formula
C12H21N2O3PS
Formula Weight
304.35
MOL File
333-41-5.mol
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Diazinon Property

Melting point:
>120°C (dec.)
Boiling point:
306°C
Density 
1.117
vapor pressure 
1.2 x 10-2 Pa (25 °C)
refractive index 
nD20 1.4978-1.4981
Flash point:
104.4 °C
storage temp. 
APPROX 4°C
solubility 
Chloroform: Slightly Soluble
pka
1.21±0.30(Predicted)
form 
Liquid
color 
Light brown to brown
Water Solubility 
Slightly soluble. 0.004 g/100 mL
Merck 
13,3019
BRN 
273790
Exposure limits
OSHA PEL: TWA 0.1 mg/m3; ACGIH TLV: TWA 0.1 mg/m3.
Stability:
Moisture Sensitive
CAS DataBase Reference
333-41-5(CAS DataBase Reference)
IARC
2A (Vol. 112) 2017
NIST Chemistry Reference
Diazinone(333-41-5)
EPA Substance Registry System
Diazinon (333-41-5)
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Safety

Hazard Codes 
Xn;N,N,Xn,F
Risk Statements 
22-50/53-36-20/21/22-11-51/53
Safety Statements 
24/25-60-61-36-26-16-36/37
RIDADR 
UN 2783/2810
OEB
D
OEL
TWA: 0.1 mg/m3 [skin]
WGK Germany 
3
RTECS 
TF3325000
HazardClass 
6.1(b)
PackingGroup 
III
HS Code 
29335990
Hazardous Substances Data
333-41-5(Hazardous Substances Data)
Toxicity
LD50 in male, female rats (mg/kg): 250, 285 orally (Gaines)
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H301Toxic if swalloed

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P273Avoid release to the environment.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P391Collect spillage. Hazardous to the aquatic environment

P405Store locked up.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
SAB2104609
Product name
Anti-PSMA5 antibody produced in rabbit
Purity
affinity isolated antibody
Packaging
100μL
Price
$524
Updated
2024/03/01
Sigma-Aldrich
Product number
SAB1300472
Product name
Anti-DGKD (C-term) antibody produced in rabbit
Purity
IgG fraction of antiserum, buffered aqueous solution
Packaging
100μG
Price
$441
Updated
2024/03/01
Sigma-Aldrich
Product number
SAB1300449
Product name
Anti-DGKZ (C-term) antibody produced in rabbit
Purity
IgG fraction of antiserum, buffered aqueous solution
Packaging
100μG
Price
$441
Updated
2024/03/01
Sigma-Aldrich
Product number
HPA063643
Product name
Anti-SUPT7L antibody produced in rabbit
Purity
Prestige Antibodies? Powered by Atlas Antibodies, affinity isolated antibody
Packaging
100μL
Price
$580
Updated
2024/03/01
Sigma-Aldrich
Product number
HPA039565
Product name
Anti-SUPT7L antibody produced in rabbit
Purity
Prestige Antibodies? Powered by Atlas Antibodies, affinity isolated antibody, buffered aqueous glycerol solution
Packaging
100μL
Price
$580
Updated
2024/03/01
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Diazinon Chemical Properties,Usage,Production

Description

Diazinon is a broad-spectrum insecticide that is active against approximately 120 species of insects and pests. It is metabolized into the cholinesterase inhibitors monothionotetraethyl pyrophosphate, dithionotetraethyl pyrophosphate, and triethylthionophosphate in vivo, which induce vomiting, fasciculation with muscular twitching, paralysis, and death (LD50 = 125 mg/kg) in rats. Diazinon induces formation of capsular adhesion in the kidneys and ulcer formation in the duodenum of dogs as well as mucosal erosion and serosal seepage in the intestines of mini pigs. Formulations containing diazinon were previously used as agricultural pesticides.

Description

Diazinon is a non-systemic organophosphate insecticide formerly used to control cockroaches, silverfish, ants, and fleas in residential, non-food buildings. Diazinon functions as the inhibitor of acetylcholinesterase (AChE), which breaks down the neurotransmitter acetylcholine (ACh) into [choline] and an acetate group. The inhibition of the AChE causes an abnormal accumulation of ACh in the synaptic cleft. However, recent studies have shown that diazinon and other kinds of organophosphate can cause neural toxicity through causing oxidative stress in the neural cells.

Chemical Properties

Diazinon is available as a colorless or dark brown liquid. It is sparingly soluble in water but very soluble in petroleum ether, alcohol, and benzene. Diazinon is used for the control of a variety of agricultural and household pests. These include pests in soil, on ornamental plants, fruit, vegetable, crops pests, and household pests like fl ies, fl eas, and cockroaches. Diazinon undergoes decomposition on heating above 120°C and produces toxic fumes, such as nitrogen oxides, phosphorous oxides, and sulfur oxides. It reacts with strong acids and alkalis with the possible formation of highly toxic tetra ethyl thiopyrophosphates. Diazinon is classifi ed as an RUP. Depending on the type of formulation, diazinon is classifi ed as toxicity class II, meaning moderately toxic, or toxicity class III, meaning slightly toxic.

Chemical Properties

Diazinon is a combustible, colorless, oily liquid. Faint amine odor. Technical grade is pale to dark brown. Commercial formulations may use carrier solvents which can change the physical properties listed here.

Uses

Nonsystemic contact insecticide used against flies, aphids and spider mites in soil, fruit, vegetables and ornamentals.

Uses

Diazinon is used to control a wide range of sucking and chewing insects and mites in a very wide range of crops and is also used as a veterinary ectoparasiticide.

Uses

insecticide, cholinesterase inhibitor

Uses

A cholinesterase inhibitor; a nonsystemic organophosphate insecticide.

Definition

ChEBI: A member of the class of pyrimidines that is pyrimidine carrying an isopropyl group at position 2, a methyl group at position 6 and a (diethoxyphosphorothioyl)oxy group at position 4.

General Description

Diazinon is available in the form of a colourless or dark brown liquid. It is sparingly soluble in water but very soluble in petroleum ether, alcohol, and benzene. Diazinon is used for the control of a variety of agriculture and household pests. These include pests in soil, on ornamental plants, fruit, vegetable, and crops and household pests like flies, fleas, and cockroaches. Diazinon undergoes decomposition on heating above 120°C and produces toxic fumes such as nitrogen oxides, phosphorus oxides, and sulphur oxides. It reacts with strong acids and alkalis with possible formation of highly toxic tetra ethyl thiopyrophosphates. Diazinon is classified as a RUP. Depending on the type of formulation, diazinon is classified as toxicity class II, meaning moderately toxic, or toxicity class III, meaning slightly toxic.

Air & Water Reactions

The neat compound is susceptible to oxidation and should be protected from prolonged exposure to air . Insoluble in water.

Health Hazard

LIQUID: POISONOUS IF SWALLOWED. Irritating to skin and eyes.

Health Hazard

Humans are exposed to diazinon during manufacture and professional applications. Diazinon causes poisoning with symptoms such as headache, dizziness, nausea, weakness, feelings of anxiety, vomiting, pupillary constriction, convulsions, respiratory distress or labored breathing, unconsciousness, muscle cramp, excessive salivation, respiratory failure, and coma.

Health Hazard

Cholinesterase inhibitor; moderately toxic byingestion and skin absorption; ingestion ofapproximately large quantities of 10–15 gcan produce cholinergic effects in adulthuman; poisoning symptoms include headache, dizziness, weakness, blurred vision,pinpoint pupils, salivation, muscle spasms,vomiting abdominal pain, and respiratorydepression; LD50 values in experimentalanimals show wide variation.
LD50 oral (rat): within the range 100–300mg/kg
LD50 oral (guinea pig): 250 mg/kg.

Fire Hazard

Not flammable. POISONOUS GASES ARE PRODUCED WHEN HEATED. Oxides of sulfur and of phosphorus are generated in fires.

Agricultural Uses

Insecticide, Acaricide: Diazinon is the most widely used pesticide by homeowners on lawns, and is one of the most widely used pesticide ingredients for application around the home and in gardens. It is used to control insects and grub worms. It is a nonsystemic organophosphate insecticide used to control cockroaches, silverfish, ants, and fleas in residential, non-food buildings. Bait is used to control scavenger yellow jackets in the western U.S. It is used on home gardens and farms to control a wide variety of sucking and leaf-eating insects. It is used on rice, fruit trees, sugarcane, corn, tobacco, potatoes and on horticultural plants, and is also an ingredient in pest strips. Diazinon has veterinary uses against fleas and ticks. It is available in dust, granules, seed dressings, wettable powder, and emulsifiable solution formulations. In 1988, there were 500 different products containing diazinon on the market, and used in such products as agricultural sprays and granules, animal ear tags, household sprays and dust and veterinary products. Not approved for use in EU countries. A U.S. EPA restricted Use Pesticide (RUP). The U.S. EPA initiated a program to phase out all non-agricultural uses of diazinon commencing in March, 2001. Many commercial outdoor uses of diazinon have been canceled or restricted to licensed pesticide applicators because of its known toxicity to birds and aquatic life. Diazinon is highly toxic to bees and very highly toxic to birds, fish and aquatic invertebrates. Diazinon was canceled for use on golf courses and sod farms in 1988 because of its high risk to birds

Trade name

AG-500®; AI3-19507®; ALFA-TOX®[C]; ANTIGAL®; ANTLAK®; BASUDIN®; BAZUDEN®; CASWELL No. 342®; DACUTOX®; DASSITOX®; DAZZEL®; DIAGRAN®; DIANON®; DIATERR-FOS®; DIAZAJET®; DIAZATOL®; DIAZIDE®; DIAZINON AG 500 WBC®; DIAZINONE®; DIAZITOL®; DIAZOL®; DICID®; DIMPYLATE®; DIPOFENE®; DIZIKTOL®; DIZINON®[C]; DRAWIZON®; DYMET®; DYZOL®); D.Z.N.®; EXODIN®; FEZUDIN®; FLYTROL®; G 301®; G-24480®; GALESAN®; GARDENTOX®; GEIGY 24480®; KAYAZINON®; KAYAZOL®; NEOCIDOL® (OIL); NEOCIDOL®; NIPSAN®; NUCIDOL®; OLEODIAZINON®; ROOT GUARD; SAROLEX®[C]; SPECTRACIDE®; SROLEX®; SUZON®

Safety Profile

Poison by ingestion, skin contact, subcutaneous, intravenous, and intraperitoneal routes. Mildly toxic by inhalation. Human systemic effects by ingestion: changes in motor activity, muscle weakness, and sweating. Experimental teratogenic and reproductive effects. A skin and severe eye irritant. Human mutation data reported. When heated to decomposition it emits very toxic fumes of NOx, POx, and SOx.

Potential Exposure

roducers, formulators and applicators of this nonsystemic pesticide and acaricide. Diazinon is used in the United States on a wide variety of agricultural crops, ornamentals, domestic animals; lawns and gardens; and household pests.

First aid

If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Speed in removing material from skinis of extreme importance. Shampoo hair promptly if contaminated. Seek medical attention immediately. If thischemical has been inhaled, remove from exposure, beginrescue breathing (using universal precautions, includingresuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit.Effects may be delayed; medical observation isrecommended

Carcinogenicity

Among 23,106 male applicators participating in the Agricultural Health Study who reported using diazinon, there was an increased risk with exposure to diazinon for lung cancer, leukemia, and all cancer sites combined, although the small number of cases observed makes these estimates unreliable .

Environmental Fate

Biological. Sethunathan and Yoshida (1973a) isolated a Flavobacterium sp. (ATCC 27551) from rice paddy water that metabolized diazinon as the sole carbon source. Diazinon was readily hydrolyzed to 2-isopropyl-4-methyl-6-hydroxypyrimidine under aerobic conditions but less rapidly under anaerobic conditions. This bacterium as well as enrichment cultures isolated from a diazinon-treated rice field mineralized the hydrolysis product to carbon dioxide (Sethunathan and Pathak, 1971; Sethunathan and Yoshida, 1973). Rosenberg and Alexander (1979) demonstrated that two strains of Pseudomonas grew on diazinon and produced diethyl phosphorothioate as the major end product. The rate of microbial degradation increased in the presence of an enzyme (parathion hydrolase), produced by a mixed culture of Pseudomonas sp. (Honeycutt et al., 1984).
Soil. Hydrolyzes in soil to 2-isopropyl-4-methyl-2-hydroxypyrimidine, diethylphosphorothioic acid, carbon dioxide (Getzin, 1967; Lichtenstein et al., 1968; Sethunathan and Yoshida, 1969; Sethunathan and Pathak, 1972; Bartsch, 1974; Wolfe et al., 1976; Somasundaram and Coats, 1991) and tetraethylpyrophosphate (Paris and Lewis, 1973). The half-life of diazinon in soil was observed to be inversely proportional to temperature and soil moisture content (Getzin, 1968). Seven months after diazinon was applied on a sandy loam (2 kg/ha), only 1% of the total applied amount remained and 10% was detected in a peat loam (Suett, 1971).
The reported half-life in soil is 32 days (Jury et al., 1987). Reported half-lives in soil following incubation of 10 ppm diazinon in sterile sand loam, sterile organic soil, nonsterile sandy loam and nonsterile organic soil are 12.5, 6.5, <1 and 2 weeks, respectively (Miles et al., 1979). The reported half-life of diazinon in sterile soil at pH 4.7 was 43.8 days (Sethunathan and MacRae, 1969). Major metabolites identified were diethyl thiophosphoric acid, 2-isopropyl-4-methyl-6-hydroxypyrimidine and carbon dioxide (Konrad et al., 1967). When soil is sterilized, the persistence of diazinon increased more so than changes in soil moisture, soil type or rate of application (Bro-Rasmussen et al., 1968). The halflives for diazinon in flooded soil incubated in the laboratory ranged from 4 to 17 days with an average half-life of 10 days (Sethunathan and MacRae, 1969; Sethunathan and Yoshida, 1969; Laanio et al., 1972). The mineralization half-life for diazinon in soil was 5.1 years (Sethunathan and MacRae, 1969; Sethunathan and Yoshida, 1969).
The half-lives of diazinon in a sandy loam, clay loam and an organic amended soil under nonsterile conditions were 66–1,496, 49–1,121 and 14–194 days, respectively, while under sterile conditions the half-lives were 57–1,634, 46–1,550 and 14–226 days, respectively (Schoen and Winterlin, 1987).
In a silt loam and sandy loam, reported Rf values were 0.86 and 0.88, respectively (Sharma et al., 1986).
Surface Water. In estuarine water, the half-life of diazinon ranged from 8.2 to 10.2 days (Lacorte et al., 1995).
Groundwater. According to the U.S. EPA (1986) diazinon has a high potential to leach to groundwater.
Plant. Diazinon was rapidly absorbed by and translocated in rice plants. Metabolites identified in both rice plants and a paddy soil were 2-isopropyl-4-methyl-6-hydroxypyrimidine (hydrolysis product), 2-(1¢-hydroxy-1¢-methyl)ethyl-4-methyl-6-hydroxypyrimidine and other polar compounds (Laanio et al., 1972). Oxidizes in plants to diazoxon (Ralls et al., 1966; Laanio et al., 1972; Wolfe et al., 1976) although 2-isopropyl-4-methyl- 6-pyrimidin-6-ol was identified in bean plants (Kansouh and Hopkins, 1968) and as a hydrolysis product in soil (Somasundaram et al., 1991) and water (Suffet et al., 1967). Five days after spraying, pyrimidine ring-labeled 14C-diazinon was oxidized to oxodiazinon which was then hydrolyzed to 2-isopropyl-4-methylpyrimidin-6-ol which in turn, was further metabolized to carbon dioxide (Ralls et al., 1966). Diazinon was transformed in field-sprayed kale plants to form hydroxydiazinon {O,O-diethyl-O-[2-(2¢-hydroxy-2¢-propyl)- 4-methyl-6-pyrimidinyl] phosphorothioate} which was not previously reported (Pardue et al., 1970).

Metabolic pathway

The main route of diazinon metabolism in soil, plants and animals is through cleavage of the P-O-pyrimidine group to yield 2-isopropyl-4- methyl-6-hydroxypyrimidine. As with most other phosphorothioates, loss of the pyrimidinyl function in mammalian metabolism probably occurs either through oxidative desulfuration of the thiono group, catalysed by microsomal mixed function oxidases, to give diazoxon followed by hydrolysis catalysed by an A-esterase, or via an oxidative mechanism catalysed by a mixed function oxidase acting directly on diazinon. In the first case the second product is diethyl phosphate and in the second, diethyl phosphorothioate (Yang et al., 1971). Further metabolism then leads to hydroxylation of the methyl and isopropyl groups on the pyrimidine ring. This oxidative metabolism may the act on the pyrimidinol, diazoxon or diazinon itself, the last of which seems to be important in mammalian and avian liver and gives rise to metabolites which still have anticholinesterase or latent anticholinesterase activity.

Metabolism

The main biodegradation pathway in mammals, plants, and soils is pyrimidinyl ester bond cleavage; the principal metabolites are diethyl phosphorothioate and diethyl phosphate. Degradation in the environment involves oxidation to diazoxon and hydrolysis.

storage

Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Store in tightly closed containers in a cool, well-ventilated area away from water, and oxidizers, such as peroxides, nitrates, permanganates,chlorates, and perchlorates.

Shipping

UN2783 Organophosphorus pesticides, solid, toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Degradation

Diazinon(1) is stable at neutral pH but is slowly hydrolysed in alkaline solutions and rapidly at acidic pH values (PM). Hydrolysis products were identified as the pyrimidinol (2) and diethyl phosphorothioate (3) (PSD, 1991).
When diazinon was dissolved in a water/soil suspension and irradiated with UV light, Mansour et al. (1997) demonstrated that one of the products was iso-diazinon (4) formed via a thiono-thiolo rearrangement (see Scheme 1).

Toxicity evaluation

The acute oral LD50 for rats and mice are 1250 and 80–135 mg/kg. Inhalation LC50 (4 h) for rats is >2330 mg/m3 air. NOEL (2 yr) for rats is 0.06 mg/kg/d.

Incompatibilities

Reaction with nitrosating agents (e.g., nitrites, nitrous gases, nitrous acid) capable of releasing carci- nogenic nitrosamines. Hydrolyzes slowly in water and dilute acid. Reacts with strong acids and alkalis with possible forma- tion of highly toxic tetraethyl thiopyrophosphates. Incompatible with copper-containing compounds. Contact with oxidizers may cause the release of phosphorous oxides. Contact with strong reducing agents, such as hydrides; may cause the formation of flammable and toxic phosphine gas.

Waste Disposal

Diazinon is hydrolyzed in acid media about 12 times as rapidly as parathion, and at about the same rate as parathion in alkaline media. In excess water this compound yields diethylthiophosphoric acid and 2-isopropyl-4-methyl-6-hydroxypyrimidine. With insufficient water, highly toxic tetraethyl monothiopyropho- sphate is formed. Therefore, incineration would be a prefer- able ultimate disposal method with caustic scrubbing of the incinerator effluent . In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by follow- ing package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office.

Precautions

Workers should avoid eye contact with diazinon, wear chemical safety glasses or goggles, protective clothing or equipment, wear waterproof boots, long-sleeved shirts, long pants, and a hat. Workers should avoid contamination of food and feed, wash thoroughly after handling and before eating or smoking. In fact, occupational workers should avoid eating, drinking, or smoking in areas of work with the chemical.

References

Uner, N, et al. "Effects of diazinon on acetylcholinesterase activity and lipid peroxidation in the brain of Oreochromis niloticus." Environmental Toxicology & Pharmacology 21.3(2006):241.
Shishido, Takashi, K. Usui, and J. I. Fukami. "Oxidative metabolism of diazinon by microsomes from rat liver and cockroach fat body." Pesticide Biochemistry & Physiology 2.1(1972):27-38.
Giordano, G, et al. "Organophosphorus insecticides chlorpyrifos and diazinon and oxidative stress in neuronal cells in a genetic model of glutathione deficiency." Toxicology & Applied Pharmacology 219.2-3(2007):181.

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View Lastest Price from Diazinon manufacturers

Hebei Zhuanglai Chemical Trading Co Ltd
Product
Diazinon 333-41-5
Price
US $50.00/kg
Min. Order
1kg
Purity
99
Supply Ability
5000
Release date
2024-11-27
WUHAN FORTUNA CHEMICAL CO., LTD
Product
Diazinon 333-41-5
Price
US $0.00/Kg/Drum
Min. Order
25KG
Purity
95%TC
Supply Ability
25tons/month
Release date
2021-06-08
Hebei Weibang Biotechnology Co., Ltd
Product
Diazinon 333-41-5
Price
US $0.00-0.00/KG
Min. Order
1KG
Purity
99%
Supply Ability
20 mt
Release date
2024-12-10

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