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Squaric acid

Dangerous Goods

CAS number:2892-51-5    molecular formula:C4H2O4

overview

compound introduction

3,4-二羟基-3-环丁烯-1,2-二酮,俗称方酸,广泛用于生物有机和药物化学。它是乙二醛酶、 semiqauric acid 、丙酮酸脱氢酶和转酮醇酶的抑制剂。 它可用作SH2结构域的肽配体中磷酸盐的替代物。它的衍生物是兴奋性氨基酸受体的高亲和力配体。这些衍生物也可用作小生物分子荧光检测用染料。 具强酸性,其pKl=1.5;pK2=3.5。与三氯化铁水溶液产生深紫色。可被溴及高锰酸钾氧化,与苯肼无反应。性质与羧酸相似,可与碱成盐,可生成酯、酰氯、酰胺及混合酸酐。水中溶解度:20 G/L (30°C)。可作为酰化试剂,与富电活化芳环进行酰化反应。与含活泼双键、活泼甲基反应,生成具特殊性能的新化合物。用作合成有机光导体、液晶显示材料、激光书写记录材料及静电照相光受体材料的中间体。 Can be used as the acylating reagent of electron-rich aromatic rings activated acylation. For synthetic organic photoconductor, LCD materials, laser writing and recording material of the electrophotographic photoreceptors intermediate material.

Specs

Chinese alias方形酸,3,4-二羟基-3-环丁烯-1,2-二酮 | 四方酸 | 1-环丁烯-3,4-二酮-1,2-二醇
English aliasBRN 0774275 | Q3008466 | 1,2-Dihydroxycyclobutene-3,4-dione | 3,4-Dihydroxy-3-cyclobutene-1,2-dione, Lonza quality, 98.50-101.00% (w/w) (HPLC) | 4-08-00-02701 (Beilstein Handbook Reference) | AKOS000121580 | 3,4-dihydroxy-cyclobut-3-ene-1,2-dione | 3,4-di
CAS number2892-51-5molecular formulaC4H2O4
molecular weight114.06 g/molExact mass≥98%
PSA74.600 Ųlogp-0.700

numbering system

No numbering system information yet

physicochemical properties

No physical and chemical property information yet

Safety information

pictogram:
GHS07
Signal word:
Warning
Hazard Statement:
H315: 引起皮肤刺激 H319: 引起严重眼睛刺激 H335: 可能引起呼吸道刺激 H317: 可能引起皮肤过敏反应
Statement of Preventive Measures:
P261: 避免吸入灰尘/烟雾/气体/雾/蒸汽/喷雾 P305+P351+P338: 如进入眼睛:用水小心冲洗几分钟。如戴隐形眼镜并可方便地取出,取出隐形眼镜。继续冲洗。 P280: 戴防护手套/穿防护服/戴防护眼罩/戴防护面具。 P302+P352: 如皮肤沾染:用水充分清洗。 P321: 特殊处理(请参阅此标签上的...)。 P405: 密闭存放 P501: 将内容物/容器处理到。。。 P264: 处理后要彻底洗手。 P271: 仅在室外或通风良好的地方使用。 P304+P340: 如误吸入:将人转移
WGK Germany:
3
Personal protective equipment:
dust mask type N95 (US),Eyeshields,Faceshields,Gloves
RTECS:
GU1800000

Production methods and uses

No production method and use information yet

Related

upstream information

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downstream information

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MSDS

Found 1 shareMSDS
2892-51-5 | 3,4-Dihydroxy-3-cyclobutene-1,2-dione.pdf