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Chemical Properties Uses Mechanism of action Toxicity Preparation method
Hexazinone structure
Chemical Name:
VELPAR;velpark;dpx3674;velparl;gridball;DPX 3674;sha107201;Hexazinon;Hexazinoe;DPX-A3674
Molecular Formula:
Formula Weight:
MOL File:

Hexazinone Properties

Melting point:
Boiling point:
395.49°C (rough estimate)
refractive index 
1.6120 (estimate)
Flash point:
storage temp. 
CAS DataBase Reference
51235-04-2(CAS DataBase Reference)
NIST Chemistry Reference
1,3,5-Triazine-2,4(1h,3h)-dione, 3-cyclohexyl-6-(dimethylamino)-1-methyl-(51235-04-2)
EPA Substance Registry System
1,3,5-Triazine-2, 4(1H,3H)-dione, 3-cyclohexyl-6-(dimethylamino)- 1-methyl-(51235-04-2)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xn,N,T,F
Risk Statements  22-36-50/53-39/23/24/25-23/24/25-11
Safety Statements  60-61-45-36/37-16-7
RIDADR  UN3077 9/PG 3
WGK Germany  3
RTECS  XY7850000
HS Code  29336990
Hazardous Substances Data 51235-04-2(Hazardous Substances Data)
Toxicity LD50 orally in rats: 1690 mg/kg (Neary)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, P501
H311 Toxic in contact with skin Acute toxicity,dermal Category 3 Danger P280, P302+P352, P312, P322, P361,P363, P405, P501
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H331 Toxic if inhaled Acute toxicity,inhalation Category 3 Danger P261, P271, P304+P340, P311, P321,P403+P233, P405, P501
H370 Causes damage to organs Specific target organ toxicity, single exposure Category 1 Danger P260, P264, P270, P307+P311, P321,P405, P501
H410 Very toxic to aquatic life with long lasting effects Hazardous to the aquatic environment, long-term hazard Category 1 Warning P273, P391, P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P273 Avoid release to the environment.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P311 Call a POISON CENTER or doctor/physician.
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P501 Dispose of contents/container to..…

Hexazinone price More Price(3)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 36129 Hexazinone PESTANAL 51235-04-2 100mg $57.7 2018-11-20 Buy
TCI Chemical H1686 Hexazinone >98.0%(HPLC)(T) 51235-04-2 5g $100 2018-11-22 Buy
TCI Chemical H1686 Hexazinone >98.0%(HPLC)(T) 51235-04-2 25g $347 2018-11-22 Buy

Hexazinone Chemical Properties,Uses,Production

Chemical Properties

The pure product is white crystalline solid. m.p.115~117℃. Vapour pressure is 2.7×10-3Pa (25℃)、8.5×10-3Pa (86℃). Relative density is 1.25. The solubility at 25 ℃: 3880g/kg in chloroform, 2650g/kg in methanol, 836g/kg in dimethylformamide,790g/kg in acetone, 940g/kg in benzene, 386g/kg in toluene, 3g/kg in hexane and 33g/kg in water. In the water solution with pH value of 5~9, it is stable at normal temperature and will be decomposed by microbes in the soil.


Post bud contact killing herbicide and the inhibitor of photosynthesis in plants. Its weed killing spectrum and killing shrub spectrum are wide, and its toxicity is strong and effective. It is used for tending young forests of evergreen coniferous forests, such as Pinus koraiensis, Pinus sylvestris, Picea spruce, Pinus massoniana and so on. Before the afforestation, it is applied to weeding and extinguishing irrigation, maintaining and opening forest fire prevention and forest soil improvement etc...It can also be used for weeding and irrigation on both sides of the oil depot, airport and road. It can prevent green bristlegrass, filipendula palmate, angelica dahurica,sedge, herba elsholtziae, reed, deyeuxia angustifolia, fern, clematis, veronica spuria, cephalanoplos segetum, wild oats, quinoa, millet, etc.. The woody plants it can can control include yellow lonicera japonica, pearl, hazel wood, spiraea salicifolia, acanthopanax senticosus, acanthopanax, winged elm, aspen, birch, quercus mongolica, linden, oak, linden, ashtree, phellodendron amurense rupr, juglans mandshurica etc.. It can control annual weed and biennial weed. A dose of 2~5kg/hm2 control weeds for a short term. Most perennial weeds can be prevented by the dose of 6~12kg/hm2. Nonionic surfactants can be added to this product.

Mechanism of action

It mainly inhibits the photosynthesis of plants and causes the disordered generation of plants and causes death. Both plant root and leaf surface can absorb the cyclohexanone, which is transported mainly through the xylem. It has great mobility in the soil and can be decomposed by soil microbes after entering the soil. It has no harm to the root of the pine tree. 7 days after the weeds have been treated, the leaves will have necrosis until the whole leaf has withered. The whole process including the upper part above ground (about 2 weeks) and the rotting of the root lasts for 1 month. It will last for 1 month from the appearance of necrosison the new leaves to rotting roots of the shrubs lasts for about 2 months. The first defoliation of non - objective arbor takes place 20~30 days after the injury. In the future, the new born leaves will be molted again, repeating 3~5 times in a row. From the spot to the formation of shrub leaf rot lasted for about 2 months. The upper part of the ground dies in 60~120 days. The roots rot in the fall of second.


The drug is of toxicity when acute oral LD50 is 1690mg/kg in rats, acute percutaneous is LD50>5278mg/kg in rabbits, acute transdermal is LD50>2000mg/kg in rats. It has a stimulating effect on the eyes of rabbits. The accumulative coefficient K value is >5, which belongs to the mild accumulative pesticide.There is no teratogenic, carcinogenic and mutagenic effects on animals within the range of experiments. No abnormality is found in the three generation reproduction test and neurotoxicity test. The non-cation dose for two years of feeding test: 200mg/kg for rats,LC50388mg/L for rainbow trout, LD50>5000mg/kg for quail, LD50>10000mg/kg for wild duck and, LC5060μg for per bee.

Preparation method




Hexazinone is a triazine compound used as a preemergence or postemergence herbicide to control many annual grasses and broad-leaved weeds in noncropped land and certain crops such as alfalfa, blueberries, coffee, pecans and sugarcane

General Description

White crystalline solid. Corrosive eye irritant. Used as an herbicide.

Air & Water Reactions

Water soluble. Rapidly decomposed in solution by strong acids and bases.

Reactivity Profile

A triazine.

Environmental Fate

Soil/Plant. Biodegrades in soil and natural waters releasing carbon dioxide. The reported half-life in soil is 1 to 6 months (Hartley and Kidd, 1987). Rhodes (1980a) found that the persistence of hexazinone varied from 4 weeks in a Delaware sandy loam to 24 weeks in a Mississippi silt loam.
Hexazinone is subject to microbial degradation (Rhodes, 1980a; Feng, 1987). Metabolites identified in soils, alfalfa and/or sugarcane include 3-(4-hydroxycyclohexyl)-6(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione, 3-cyclohexyl-6-(methylamino)-1
Feng (1987) monitored the persistence and degradation of hexazinone in a silt loam soil 104 days after treatment of the herbicide. After 104 days, 66% of the hexazinone degraded via hydroxylation to form the major metabolite 3-(4-hydroxycyclohexyl)-6(dime
No traces of hexazinone or its metabolites were detected on treated blueberries (Jenson and Kimball, 1985).
Photolytic. Photodegradation products identified in aqueous hexazinone solutions following exposure to UV light (λ = 300–400 nm) were 3-(4-hydroxycyclohexyl)-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione, 3-cyclohexyl-6-(methylamino)

Metabolic pathway

In clay and sand soils, hexazinone is metabolized by hydroxylation at the 4-position of the cyclohexane ring and mono-N-demethylation to give [3-(4- hydroxycyclohexyl)-6-(dimethylamino)-1-methyl-1,3,5- triazine-2,4-(1H,3H )-dione], and [3-cyclohexyl-6- (methylamino)-1-methyl-1,3,5-triazine-2,4-(1H,3H )- dione, respectively. N-Demethylated metabolite is found in a comparatively higher percentage than the hydroxylated metabolite in both clay and sand soils.

Hexazinone Preparation Products And Raw materials

Raw materials

Preparation Products

Hexazinone Suppliers

Global( 117)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22064 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20743 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32606 55
Xiamen AmoyChem Co., Ltd
+86 (0)592-605 1114 CHINA 6402 58
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254 CHINA 20177 58
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96815 76
BEST-REAGENT 400-1166-196 18981987031
028-84555506 QQ:800101999 China 9880 57
03-3668-0520 Japan 28557 80
TCI Europe +32 (0)3 735 07 00
+32 (0)3 735 07 01 Europe 28001 75
TCI AMERICA +1-800-423-8616 / +1-503-283-1681
+1-888-520-1075 / +1-503-283-1987 United States 27822 75

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