草酸
草酸用途
草酸名称
[ CAS 号 ]:
144-62-7
[ 中文名 ]:
草酸
[ 英文名 ]:
Oxalic acid
[中文别名 ]:
[英文别名 ]:
- Aktisal
- Aquisal
- Oxaalzuur
- ethane-1,2-dioic acid
- Oxalic acid
- Ethanedioic acid
- EINECS 205-634-3
- BETZ 0295
- oxalic
- MFCD00002573
草酸生物活性
[ 描述 ]:
[ 相关类别 ]:
[ 靶点 ]
Human Endogenous Metabolite
[体外研究]
[参考文献]
草酸物理化学性质
[ 密度 ]:
1.8±0.1 g/cm3
[ 沸点 ]:
365.1±25.0 °C at 760 mmHg
[ 熔点 ]:
189.5 °C (dec.)(lit.)
[ 分子式 ]:
C2H2O4
[ 分子量 ]:
90.035
[ 闪点 ]:
188.8±19.7 °C
[ 精确质量 ]:
89.995308
[ PSA ]:
74.60000
[ LogP ]:
-1.19
[ 外观性状 ]:
无气味的白色固体
[ 蒸汽密度 ]:
4.4 (vs air)
[ 蒸汽压 ]:
0.0±1.7 mmHg at 25°C
[ 折射率 ]:
1.480
[ 储存条件 ]:
库房通风低温干燥,与氧化剂、酸类、碱类、食品添加剂分开存放
[ 水溶解性 ]:
90 g/L (20 ºC)
草酸MSDS
草酸毒性和生态
CHEMICAL IDENTIFICATION
- RTECS NUMBER :
- RO2450000
- CHEMICAL NAME :
- Oxalic acid
- CAS REGISTRY NUMBER :
- 144-62-7
- BEILSTEIN REFERENCE NO. :
- 0385686
- LAST UPDATED :
- 199712
- DATA ITEMS CITED :
- 38
- MOLECULAR FORMULA :
- C2-H2-O4
- MOLECULAR WEIGHT :
- 90.04
- WISWESSER LINE NOTATION :
- QVVQ
HEALTH HAZARD DATA
ACUTE TOXICITY DATA
- TYPE OF TEST :
- Standard Draize test
- ROUTE OF EXPOSURE :
- Administration onto the skin
- SPECIES OBSERVED :
- Rodent - rabbit
- REFERENCE :
- 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,311,1986
- TYPE OF TEST :
- Standard Draize test
- ROUTE OF EXPOSURE :
- Administration into the eye
- SPECIES OBSERVED :
- Rodent - rabbit
- REFERENCE :
- 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,311,1986
- TYPE OF TEST :
- Rinsed with water
- ROUTE OF EXPOSURE :
- Administration into the eye
- SPECIES OBSERVED :
- Rodent - rabbit
- REFERENCE :
- FCTOD7 Food and Chemical Toxicology. (Pergamon Press Inc., Maxwell House, Fairview Park, Elmsford, NY 10523) V.20- 1982- Volume(issue)/page/year: 20,573,1982 ** ACUTE TOXICITY DATA **
- TYPE OF TEST :
- LDLo - Lowest published lethal dose
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Human - woman
- DOSE/DURATION :
- 600 mg/kg
- TOXIC EFFECTS :
- Gastrointestinal - changes in structure or function of esophagus Gastrointestinal - hypermotility, diarrhea Gastrointestinal - other changes
- REFERENCE :
- YKYUA6 Yakkyoku. Pharmacy. (Nanzando, 4-1-11, Yushima, Bunkyo-ku, Tokyo, Japan) V.1- 1950- Volume(issue)/page/year: 31,959,1980
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 7500 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- REFERENCE :
- TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 42,417,1977
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Unreported
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 1400 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- REFERENCE :
- GISAAA Gigiena i Sanitariya. For English translation, see HYSAAV. (V/O Mezhdunarodnaya Kniga, 113095 Moscow, USSR) V.1- 1936- Volume(issue)/page/year: 50(3),57,1985
- TYPE OF TEST :
- LD50 - Lethal dose, 50 percent kill
- ROUTE OF EXPOSURE :
- Intraperitoneal
- SPECIES OBSERVED :
- Rodent - mouse
- DOSE/DURATION :
- 270 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- REFERENCE :
- TXCYAC Toxicology. (Elsevier Scientific Pub. Ireland, Ltd., POB 85, Limerick, Ireland) V.1- 1973- Volume(issue)/page/year: 62,203,1990
- TYPE OF TEST :
- LDLo - Lowest published lethal dose
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Mammal - dog
- DOSE/DURATION :
- 1 gm/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- REFERENCE :
- HBAMAK "Abdernalden's Handbuch der Biologischen Arbeitsmethoden." (Leipzig, Ger. Dem. Rep.) Volume(issue)/page/year: 4,1377,1935
- TYPE OF TEST :
- LDLo - Lowest published lethal dose
- ROUTE OF EXPOSURE :
- Subcutaneous
- SPECIES OBSERVED :
- Mammal - cat
- DOSE/DURATION :
- 112 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- REFERENCE :
- HBAMAK "Abdernalden's Handbuch der Biologischen Arbeitsmethoden." (Leipzig, Ger. Dem. Rep.) Volume(issue)/page/year: 4,1377,1935
- TYPE OF TEST :
- LDLo - Lowest published lethal dose
- ROUTE OF EXPOSURE :
- Subcutaneous
- SPECIES OBSERVED :
- Amphibian - frog
- DOSE/DURATION :
- 757 mg/kg
- TOXIC EFFECTS :
- Details of toxic effects not reported other than lethal dose value
- REFERENCE :
- HBAMAK "Abdernalden's Handbuch der Biologischen Arbeitsmethoden." (Leipzig, Ger. Dem. Rep.) Volume(issue)/page/year: 4,1377,1935 ** OTHER MULTIPLE DOSE TOXICITY DATA **
- TYPE OF TEST :
- TDLo - Lowest published toxic dose
- ROUTE OF EXPOSURE :
- Oral
- SPECIES OBSERVED :
- Rodent - rat
- DOSE/DURATION :
- 175 gm/kg/70D-C
- TOXIC EFFECTS :
- Endocrine - changes in thyroid weight Musculoskeletal - other changes Nutritional and Gross Metabolic - weight loss or decreased weight gain
- REFERENCE :
- TXAPA9 Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 48,409,1979 ** REPRODUCTIVE DATA **
- TYPE OF TEST :
- TDLo - Lowest published toxic dose
- ROUTE OF EXPOSURE :
- Oral
- DOSE :
- 8400 mg/kg
- SEX/DURATION :
- male 7 day(s) pre-mating female 7 day(s) pre-mating - 21 day(s) after conception
- REFERENCE :
- NTIS** National Technical Information Service. (Springfield, VA 22161) Formerly U.S. Clearinghouse for Scientific & Technical Information. Volume(issue)/page/year: PB86-167053 *** REVIEWS *** ACGIH TLV-STEL 2 mg/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 ACGIH TLV-TWA 1 mg/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: TLV/BEI,1997 TOXICOLOGY REVIEW FNSCA6 Forensic Science. (Lausanne, Switzerland) V.1-11, 1972-78. For pub lisher information, see FSINDR. Volume(issue)/page/year: 2,67,1973 *** U.S. STANDARDS AND REGULATIONS *** EPA FIFRA 1988 PESTICIDE SUBJECT TO REGISTRATION OR RE-REGISTRATION FEREAC Federal Register. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) V.1- 1936- Volume(issue)/page/year: 54,7740,1989 MSHA STANDARD-air:TWA 1 mg/m3 DTLVS* The Threshold Limit Values (TLVs) and Biological Exposure Indices (BEIs) booklet issues by American Conference of Governmental Industrial Hygienists (ACGIH), Cincinnati, OH, 1996 Volume(issue)/page/year: 3,193,1971 OSHA PEL (Gen Indu):8H TWA 1 mg/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1910.1000,1994 OSHA PEL (Construc):8H TWA 1 mg/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1926.55,1994 OSHA PEL (Shipyard):8H TWA 1 mg/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 29,1915.1000,1993 OSHA PEL (Fed Cont):8H TWA 1 mg/m3 CFRGBR Code of Federal Regulations. (U.S. Government Printing Office, Supt. of Documents, Washington, DC 20402) Volume(issue)/page/year: 41,50-204.50,1994 *** OCCUPATIONAL EXPOSURE LIMITS *** OEL-ARAB Republic of Egypt:TWA 1 mg/m3 JAN 1993 OEL-AUSTRALIA:TWA 1 mg/m3;STEL 2 mg/m3 JAN 1993 OEL-BELGIUM:TWA 1 mg/m3;STEL 2 mg/m3 JAN 1993 OEL-DENMARK:TWA 1 mg/m3 JAN 1993 OEL-FINLAND:TWA 1 mg/m3;STEL 3 mg/m3 JAN 1993 OEL-FRANCE:TWA 1 mg/m3 JAN 1993 OEL-THE NETHERLANDS:TWA 1 mg/m3 JAN 1993 OEL-THE PHILIPPINES:TWA 1 mg/m3 JAN 1993 OEL-SWITZERLAND:TWA 1 mg/m3 JAN 1993 OEL-UNITED KINGDOM:TWA 1 mg/m3;STEL 2 mg/m3 JAN 1993 OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGIH TLV *** NIOSH STANDARDS DEVELOPMENT AND SURVEILLANCE DATA *** NIOSH RECOMMENDED EXPOSURE LEVEL (REL) : NIOSH REL TO OXALIC ACID-air:10H TWA 1 mg/m3;STEL 2 mg/m3 REFERENCE : NIOSH* National Institute for Occupational Safety and Health, U.S. Dept. of Health, Education, and Welfare, Reports and Memoranda. Volume(issue)/page/year: DHHS #92-100,1992 NIOSH OCCUPATIONAL EXPOSURE SURVEY DATA : NOHS - National Occupational Hazard Survey (1974) NOHS Hazard Code - 52480 No. of Facilities: 11395 (estimated) No. of Industries: 109 No. of Occupations: 66 No. of Employees: 180732 (estimated) NOES - National Occupational Exposure Survey (1983) NOES Hazard Code - 52480 No. of Facilities: 6866 (estimated) No. of Industries: 75 No. of Occupations: 84 No. of Employees: 142000 (estimated) No. of Female Employees: 58727 (estimated)
草酸安全信息
[ 符号 ]:
GHS05, GHS07
[ 信号词 ]:
Danger
[ 危害声明 ]:
H302 + H312-H318
[ 警示性声明 ]:
P280-P305 + P351 + P338
[ 个人防护装备 ]:
dust mask type N95 (US);Eyeshields;Gloves
[ 危害码 (欧洲) ]:
Xn:Harmful
[ 风险声明 (欧洲) ]:
R21/22
[ 安全声明 (欧洲) ]:
S24/25-S23-S36/37/39-S27-S26
[ 危险品运输编码 ]:
UN 3261 8/PG 3
[ WGK德国 ]:
1
[ RTECS号 ]:
RO2450000
[ 包装等级 ]:
III
[ 危险类别 ]:
8
[ 海关编码 ]:
2917111000
草酸合成路线
草酸上下游产品
草酸上游产品
草酸下游产品
草酸制备
1.草酸遍布于自然界,常以草酸盐形式存在于植物如伏牛花、羊蹄草、酢浆草和酸模草的细胞膜,几乎所有的植物都含有草酸钙。草酸工业化生产方法主要有:甲酸钠法、氧化法、羰基合成法、乙二醇氧化法、丙烯氧化法、一氧化碳偶联法。
(1).甲酸钠法一氧化碳净化后在加压情况下与氢氧化钠反应,生成甲酸钠,然后经高温脱氢生成草酸钠,草酸钠再经铅化(或钙化)、酸化、结晶和脱水干燥等工序,得到成品草酸。一氧化碳与氢氧化钠合成压力一般为1.8-2.0MPa。脱氢温度为400℃。
(2).氧化法以淀粉或葡萄糖母液为原料,在矾触媒存在下,与硝酸-硫酸进行氧化反应得草酸。废气中的氧化氮送吸收塔回收生成稀硝酸。
(3).羰基合成法一氧化碳经提纯到90%以上,在钯催化剂存在下与丁醇发生羰基化反应,生成草酸二丁酯,然后通过水解得到草酸,此法分为液相法和气相法两种,气相法反应条件较低,反应压力为300-400kPa。而液相法反应压力为13.0-15.0MPa。
(4).乙二醇氧化法以乙二醇为原料,在硝酸和硫酸存在下,用空气氧化而得。5.丙烯氧化法氧化过程分两步进行。第一步用硝酸氧化,使丙烯转化为α-硝基乳酸;然后进一步催化氧化得到草酸。第二步也可采用混酸为氧化剂。丙烯氧化法生产工业级草酸二水化合物,以丙烯计总收率大于90%。原料消耗定额:焦炭(84%)510kg/t、硫酸(100%)950kg/t、烧碱(100%)920kg/t。
2.将二水合草酸H2C2O4·2H2O加热到100℃或在脱水能力强的干燥器中可转化为无水合物。
3.将炉煤气精制加压,与氢氧化钠溶液在一定温度下逆流接触,生成甲酸钠。甲酸钠水溶液经蒸发浓缩,离心分离而得到甲酸钠结晶。将甲酸钠在煅烧炉中转化为草酸钠,经水洗、过滤除去碳酸钠后,加入消石灰反应。生成的草酸钙滤出并用硫酸分解。滤出硫酸钙,所得草酸结晶用重结晶法精制。或者用含30%~40%硫酸和20%~25%硝酸的混合液及五氧化二钒催化剂,在一定温度和压力下氧化乙二醇制得。也可以葡萄糖、蔗糖、淀粉、糊精和糖浆等碳水化合物为原料,在钒催化剂存在下,通过硝酸硫酸氧化而制得草酸。粗品用母液和热水再溶解,经脱脂、分离、过滤和重结晶制得。
4.碳水化合物氧化法 以葡萄糖、蔗糖、淀粉、糊精和糖浆等碳水化合物为原料,在钒催化剂存在下,通过硝酸-硫酸氧化而制得草酸。粗晶经冷却、结晶、离心、干燥得成品。废气中的氧化氮送入吸收塔回收稀硝酸。在73~80℃的温度下,将约含85%纯淀粉的原料加到草酸母液中,分散成浆液并回流水解约6h。所得淀粉溶液含有50%~60%的葡萄糖,送入装有钒催化剂的反应器中与回收的较浓草酸母液混合,用蒸汽将葡萄糖母液加热至约63℃,在搅拌下逐渐加入硝酸进行氧化反应。反应热通过冷却盘管吸收,生成的NO烟雾通过鼓入空气除去。氧化反应完成后送入粗结晶器,搅拌冷却到24~30℃,排入沉淀槽进一步结晶,然后离心分离。母液经蒸发浓缩供下批循环使用。粗产物用母液和热水再溶解,经脱脂、分离、过滤和重结晶,最 终 产 品 纯 度 达99%以 上,草 酸 二 水 化 合 物 产 率 为63%~65%。
5.在实验室用的烘箱中,放尽可能多的瓦盘或搪瓷盘。将烘箱内的温度调节至98一99℃。当温度恒定时,取出盘子,迅速在其中铺一层(厚度不超过3一4mfn)研细了的结晶草酸。然后迅速地放回烘箱内;在几分钟内温度稍有降低。当烘箱内重新达到调节好的温度后,再烘2小时。稍冷,取出产物,如果有结块的现象,研碎,迅速装入瓶中。从100克结晶草酸可得无水草酸69-70克〔为理论产量的96-98%。用标准碱液滴定,证明产物纯度为99.5-100%
此外,无水草酸还可利用四氯化碳挥发时带走结品草酸的水而制得。此法装置较复杂,脱水时间长。
6. 烟草:FC,50;BU,39;FC,38。
草酸海关
[ 海关编码 ]: 2917111000
草酸文献
Food Chem. 166 , 301-8, (2014)
Sodium chloride has been shown to promote chlorination of glycerol during thermal processing. However, the detailed mechanism of this reaction is not well understood. Preliminary experiments have indi...
A kinetic study of the enhancement of solution chemiluminescence of glyoxylic acid oxidation by manganese species.Luminescence 30 , 507-11, (2015)
In order to study the mechanism of the enhancement of solution chemiluminescence, the kinetics of the decay of the oxidant and the chemiluminescence emission were followed for oxidations by permangana...
Oxalate secretion by ectomycorrhizal Paxillus involutus is mineral-specific and controls calcium weathering from minerals.Sci. Rep. 5 , 12187, (2015)
Trees and their associated rhizosphere organisms play a major role in mineral weathering driving calcium fluxes from the continents to the oceans that ultimately control long-term atmospheric CO2 and ...
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区域:上海市普陀区
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联系人:徐经理
产品详情:无水草酸
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草酸相关知识
2022-05-05 17:21:01
草酸又名乙二酸,在草本植物中广泛存在。研究表明:在植物的93个属中,只有11个属中不含草酸,而其余属的绝大多数种均含有大量草酸 。从食品营养学角度来看,草酸被认为是一种毒素和抗营养因子。长期摄入一些富含草酸的食物不仅易使人体产生钙和其它微量元素的缺乏症,而且易引起人体尿路结石等一系列的疾病,严重者...
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本文详细介绍草酸的用途和储运特性。 一、草酸的用途: 1.用作络合剂、掩蔽剂、沉淀剂、还原剂 分析中用以检定和测定铍、钙、铬、金、锰、锶、钍等金属离子。显微微晶分析检验钠和其他元素。校准高锰酸钾和硫酸铈溶液的标准溶液。建筑行业在涂刷外墙涂料前、由于墙面碱性较强应先涂刷草酸除碱。 2.用作酚...
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【草酸】化源网提供草酸CAS号144-62-7,草酸MSDS及其说明、性质、英文名、生产厂家、作用/用途、分子量、密度、沸点、熔点、结构式等。CAS号查询草酸上化源网,专业又轻松。>>电脑版:草酸
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