新《生活饮用水卫生标准》GB5749- 项目解读莠去津-水质标准-标准-环球水网http://www.samsco.com.cn/

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新《生活饮用水卫生标准》GB5749- 项目解读莠去津

关键词：标准 GB 生活饮用水饮用水生活饮用水卫生标准

莠去津
除草剂
英文名称： Atrazine.
化学式：C8H14CLN5
其它名称: 阿特拉津
化学名称：2-氯-4-二乙胺基-6-异丙胺基-1，3，5-嗪
主要理化性质：纯品为白色结晶，熔点为173-175度，25度在水中溶解度为33ug/ml，微溶于有机溶剂。在微酸或微碱性介质中较稳定，在高温下，能被强酸和碱水解，不可燃，不爆炸，无腐蚀性。
毒性: 对人畜低毒，大鼠急性经口LD50为1780毫克/公斤，对兔急性经皮LD50为7000毫克/公斤，对大鼠慢性毒性经口无作用剂量为1000毫克/公斤。

Synonyms

Atrazine

2-Chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine

Analytical Methods

EPA Method 505

EPA Method 525

EPA Method 619

EPA Method 8141A

Molecular Formula

C₈H₁₄ClN₅

Use

ATRAZINE IS A WIDELY USED SELECTIVE HERBICIDE FOR CONTROL OF BROADLEAF & GRASSY WEEDS IN CORN, SORGHUM, RANGELAND, SUGARCANE, MACADAMIA ORCHARDS, PINEAPPLE, & TURF GRASS SOD. IT IS USED ALSO IN SOME AREAS FOR SELECTIVE WEED CONTROL IN CONIFER REFORESTATION & CHRISTMAS TREE PLANTATION AS WELL AS FOR NONSELECTIVE CONTROL OF VEGETATION IN CHEMICAL FALLOW. ATRAZINE ALSO IS USED AS A NONSELECTIVE HERBICIDE FOR VEGETATION CONTROL IN NONCROP LAND. Selective pre- & post-emergence herbicide used in asparagus, forestry, grasslands, grass crops, roses. Crisazina pre and early postemergence on African oil palm, bananas, citrus groves, coffee, corn, pineapples, sorghum, sugarcane.

Consumption Patterns

96% AS AN AGRICULTURAL HERBICIDE FOR GRASSES & BROADLEAF WEEDS (PRINCIPALLY ON CORN, SORGHUM & SUGARCANE); 2% AS A HERBICIDE IN INDUSTRIAL & COMMERCIAL APPLICATIONS (IN RE-FORESTATION); 2% AS A HERBICIDE FOR HOME & GARDEN USE (ON TURF) (1972).

Apparent Color

WHITE, CRYSTALLINE ; COLORLESS POWDER

Odor

Odorless

Melting Point

171-174 DEG C

Molecular Weight

215.68

Density

1.187 g/cu cm @ 20 deg C

Environmental Impact

Atrazine may be released into the environment via effluents at manufacturing sites and at points of application where it is employed as a herbicide. The s- triazine ring of atrazine is fairly resistant to degradation. 2-Chloro-4- ethyl-amino-6-amino-s-triazine, 2-chloro-4-amino-6-isopropylamino-s-triazine, 2-hydroxy-4-ethylamino-6-isopropyl-amino-s-triazine and 2-hydroxy-4- ethylamino-6-amino-s-triazine have been identified as microbial transformation products of atrazine. Chemical degradation of atrazine may be more important environmentally than biodegradation. Atrazine may hydrolyze fairly rapidly in either acidic or basic environments, yet is fairly resistent to hydrolysis at neutral pHs. Furthermore the rate of hydrolysis was found to drastically increase upon small additions of humic materials, indicating atrazine hydrolysis could be catalyzed. For example, the half-life of atrazine at 25 deg C and pH of 4 was 244 days without an additive and 1.73 days with the presence of 2% humic acid. At 25 deg C, a 5 mg/l solution of fulvic acid (naturally occurs in soils and most surface waters) resulted in half-lives of 34.8, 174, 398 and 742 days at pHs of 2.9, 4.5, 6.0 and 7.0, respectively. Hydrolysis of atrazine followed first order kinetics producing hydroxyatrazine as the transformation product. Photolysis of atrazine did not occur in alcohols and water at wavelengths > 300 nm. However, at wavelengths greater than or equal to 290 nm, the photolysis half-life of atrazine at a concn of 10 mg/l in aqueous solution at 15 deg C was 25 hr as compared to a half-life of 4.9 hr for identical conditions with an acetone sensitizer added at a concn of 1 ml/100 ml. Atrazine is expected to maintain a very high to medium mobility class i