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옥살산

옥살산
옥살산 구조식 이미지
카스 번호:
144-62-7
한글명:
옥살산
동의어(한글):
옥살산;옥살릭애씨드;옥살릭애씨드,그에스텔류및알칼리염류
상품명:
Oxalic acid
동의어(영문):
oxalic;Aktisal;Aquisal;caosuan;HOOCCOOH;BETZ 0295;Kleesαure;Oxaalzuur;Oxalsαure;DeerClean
CBNumber:
CB0323998
분자식:
C2H2O4
포뮬러 무게:
90.03
MOL 파일:
144-62-7.mol

옥살산 속성

녹는점
189.5 °C (dec.)(lit.)
끓는 점
365.1°C (estimate)
밀도
0.99 g/mL at 25 °C
증기 밀도
4.4 (vs air)
증기압
<0.01 mm Hg ( 20 °C)
굴절률
1.4261 (estimate)
인화점
101-157°C
저장 조건
Store below +30°C.
용해도
water: soluble108g/L at 25°C
물리적 상태
Liquid
산도 계수 (pKa)
1.23(at 25℃)
색상
White
수소이온지수(pH)
1 (100g/l, H2O, 20℃)
수용성
90 g/L (20 ºC)
승화점
101-157 ºC
Merck
14,6911
BRN
385686
Henry's Law Constant
1.43 at pH 4 (quoted, Gaffney et al., 1987)
노출 한도
NIOSH REL: TWA 1, STEL 2, IDLH 500; OSHA PEL: TWA 1; ACGIH TLV: TWA 1, STEL 2 (adopted).
안정성
Stable, but moisture sensitive. Incompatible with metals.
InChIKey
MUBZPKHOEPUJKR-UHFFFAOYSA-N
CAS 데이터베이스
144-62-7(CAS DataBase Reference)
NIST
Oxalic acid(144-62-7)
EPA
Oxalic acid (144-62-7)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 Xn
위험 카페고리 넘버 21/22-63-34-41
안전지침서 24/25-23-36/37/39-27-26-39-37-36-36/37
유엔번호(UN No.) UN 3261 8/PG 3
WGK 독일 1
RTECS 번호 RO2450000
TSCA Yes
위험 등급 8
포장분류 III
HS 번호 29171110
유해 물질 데이터 144-62-7(Hazardous Substances Data)
독성 LD50 orally in Rabbit: 375 mg/kg
그림문자(GHS):
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H302 삼키면 유해함 급성 독성 물질 - 경구 구분 4 경고 P264, P270, P301+P312, P330, P501
H312 피부와 접촉하면 유해함 급성 독성 물질 - 경피 구분 4 경고 P280,P302+P352, P312, P322, P363,P501
H318 눈에 심한 손상을 일으킴 심한 눈 손상 또는 자극성 물질 구분 1 위험 P280, P305+P351+P338, P310
예방조치문구:
P280 보호장갑/보호의/보안경/안면보호구를 착용하시오.
P321 (…) 처치를 하시오.
P305+P351+P338 눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.

옥살산 C화학적 특성, 용도, 생산

개요

상온에서는 백색의 고체 상태로 존재한다. 189.5°C에서 분해되며 녹는다. 옥살산 이수화물(C2H2O4·2 H2O)은 101.5°C에 녹는다. 산화되기 쉬워서 정량할 때는 묽은 황산 용액에서 과망가니즈산 칼륨으로 산화시키는 방법을 사용한다. 진한 황산과 함께 가열되면 같은 부피의 일산화 탄소와 이산화 탄소를 생성한다.

용도

표백제의 주 성분이며, 포도당과 물엿을 만들 때 쓰이기도 한다. 또한 강한 환원제라 녹 제거나 희토류 추출용으로도 쓴다.

안전성

옥살산은 독성이 있기 때문에 취급에 유의해야 한다. 삼킬 경우 치명적일 수 있으며, 부식성이다. 피부, 눈, 기도 등에 심각한 염증이나 화상을 일으킬 수 있고, 피부를 통해 흡수될 수도 있다. 옥살산이 체내에 유입될 경우 신장에 손상을 줄 수 있다.

화학적 성질

white crystalline powder

화학적 성질

Oxalic acid is a colorless, odorless powder, or granular solid. The anhydrous form (COOH)2 is an odorless, white solid; the solution is a colorless liquid.

물리적 성질

Colorless and odorless rhombic crystals. Hygroscopic.

용도

Oxalic acid was used: · in the synthesis of hemicellulose hydrolysates of yellow poplars; · in the synthesis of three-dimensionally ordered macroporous metal oxides or carbonates via templating with polystyrene spheres; · as supporting electrolyte in the electrochemical synthesis of polyaniline-polypyrrole composite coatings.

용도

Oxalic acid is made by the action of nitric acid on sugars, starch, or cellulose. This highly poisonous colorless crystal is soluble in water, alcohol, and ether. It was used to make ferric oxalate, as a preservative for pyrogallic acid developers, as a sensitizer for platinum papers, and to reduce the density of cyanotype prints.

용도

An impurity of oxaliplatin which is a coordination complex that is used in cancer chemotherapy.

정의

ChEBI: An alpha,omega-dicarboxylic acid that is ethane substituted by carboxyl groups at positions 1 and 2.

정의

A white crystalline organic acid that occurs naturally in rhubarb, sorrel, and other plants of the genus Oxalis. It is slightly soluble in water, highly toxic, and used in dyeing and as a chemical reagent.

일반 설명

Odorless white solid. Sinks and mixes with water.

공기와 물의 반응

Water soluble. Hygroscopic

반응 프로필

Oxalic acid is hygroscopic and sensitive to heat. Oxalic acid may react violently with furfuryl alcohol, silver, sodium, perchlorate, sodium hypochlorite, strong oxidizers, sodium chlorite, acid chlorides, metals and alkali metals. . The heating of mixtures of Oxalic acid and urea has lead to explosions. This is due to the rapid generation of the gases, CO2, CO, and NH3, [Praxis Naturwiss. Chem., 1987, 36(8), 41-42]. Oxalic acid and urea react at high temperatures to form toxic and flammable ammonia and carbon monoxide gasses, and inert CO2 gas [Von Bentzinger, R. et al., Praxis Naturwiss. Chem., 1987, 36(8), 41-42].

건강위험

As dust or as a solution, can cause severe burns of eyes, skin, or mucous membranes. Ingestion of 5 grams has caused death with symptoms of nausea, shock, collapse, and convulsions coming on rapidly. Repeated or prolonged skin exposure can cause dermatitis and slow-healing ulcers.

화재위험

Special Hazards of Combustion Products: Generates poisonous gases

농업용

Oxalic acid, (COOH)2, also called ethanedioic acid, is a white, crystalline solid, slightly soluble in water. It is a naturally occurring highly oxidized organic compound with significant chelating activity. It is strongly acidic and poisonous, produced by many plants like sorrel (sourwood), the leaf blades of rhubarb, bark of eucalyptus and many plant roots. In plant cells and tissues, oxalic acid gets accumulated as either sodium, potassium or calcium oxalate, of which the latter occurs as crystals. In turn, salts of oxalic acids enter the bodies of animals and human beings, causing pathological disorders, depending upon the amount consumed. Many species of fungi like Aspergillus, Penicillium, Mucor, as well as some lichens and slime moulds produce calcium oxalate crystals. Upon the death of these microorganisms, plants and animals, the salts get released into the soil, causing some amount of toxicity. However, oxalate-degrading microbes, called Oxalobacter formigenes, decrease oxalate absorption in animals and humans.
Oxalic acid is the first of a series of dicarboxylic acids. It is used (a) as a bleaching agent for stains like rust or ink, (b) in textile and leather production, and (c) as monoglyceryl oxalate in the production of ally1 alcohol and formic acid.

Safety Profile

Poison by subcutaneous route. Moderately toxic by ingestion. A skin and severe eye irritant. Acute oxalic poisoning results from ingestion of a solution of the acid. There is marked corrosion of the mouth, esophagus, and stomach, with symptoms of vomiting, burning abdominal pain, collapse, and sometimes convulsions. Death may follow quickly. The systemic effects are attributed to the removal by the oxalic acid of the calcium in the blood. The renal tubules become obstructed by the insoluble calcium oxalate, and there is profound hdney dlsturbance. The chief effects of inhalation of the dusts or vapor are severe irritation of the eyes and upper respiratory tract, gastrointestinal disturbances, albuminuria, gradual loss of weight, increasing weakness and nervous system complaints, ulceration of the mucous membranes of the nose and throat, epistaxis, headache, irritation, and nervousness. Oxalic acid has a caustic action on the skin and may cause dermatitis; a case of early gangrene of the fingers resembling that caused by phenol has been described. More severe cases may show albuminuria, chronic cough, vomiting, pain in the back, and gradual emaciation and weakness. The skin lesions are characterized by crachng and fissuring of the skin and the development of slow-healing ulcers. The skin may be bluish in color, and the nails brittle and yellow. Violent reaction with furfuryl alcohol, Ag, NaClO3, NaOCl. When heated to decomposition it emits acrid smoke and irritating fumes. See also OXALATES

잠재적 노출

Oxalic acid is used in textile finishing, paint stripping; metal and equipment cleaning; as an intermediate; as an analytic reagent and in the manufacture of dyes, inks, bleaches, and paint removers; varnishes, wood, and metal cleansers; dextrin, cream of tartar, celluloid, oxalates, tartaric acid, purified methyl alcohol, glycerol, and stable hydrogen cyanide. It is also used in the photographic, ceramic, metallurgic, rubber, leather, engraving, pharmaceutical, paper, and lithographic industries.

Source

Oxalic acid occurs naturally in many plants including buckwheat leaves (111,000 ppm), lambsquarter (140,000 to 300,000 ppm), black pepper (4,000 to 34,000 ppm), star fruit (50,000 to 95,800 ppm), purslane (1,679 to 16,790 ppm), nance bark (27,300 ppm), rhubarb 4,400 to 13,360 ppm), tea leaves (2,192 to 10,000 ppm), bitter lettuce (10,000 ppm), spinach (6,580 ppm), cacao (1,520 to 5,000 ppm), bananas (22 to 5,240 ppm), ginger (5,000 ppm in rhizome), cashews (3,184 ppm), almonds (4,073 ppm), taro roots (1,334 ppm), tamarind (1,960 ppm), garden sorrel (3,000 ppm), mustard green leaves (1,287 ppm), peppers (257 to 1,171 ppm), sweet potato roots (1,000 ppm), pumpkins, oats (400 ppm), tomatillo (109 to 536 ppm), various cabbage leaves (59 to 350 ppm), and horseradish (Duke, 1992).
Oxalic acid was identified as a constituent in a variety of composted organic wastes. Detectable concentrations were reported in all 21 composts extracted with water. Concentrations ranged from 0.60 mmol/kg in a straw + dairy cattle manure to 21.89 mmol/kg in straw + wood bark + dairy cattle manure. The overall average concentration was 9.67 mmol/kg (Baziramakenga and Simard, 1998).

환경귀착

Biological. Heukelekian and Rand (1955) reported a 5-d BOD value of 0.12 g/g which is 66.7% of the ThOD value of 0.18 g/g.
Chemical/Physical. At temperatures greater than 189.5 °C, decomposes to carbon dioxide, carbon monoxide, formic acid, and water (Windholz et al., 1983). Ozonolysis of oxalic acid in distilled water at 25 °C under acidic conditions (pH 6.3) yielded carbon dioxide (Kuo et al., 1977). Absorbs moisture in air forming the dihydrate (Huntress and Mulliken, 1941).
Reacts with bases forming water soluble salts.

운송 방법

UN3261 Corrosive solid, acidic, organic, n.o.s., Hazard class: 8; Labels: 8-Corrosive material, Technical Name Required.

비 호환성

The aqueous solution is a medium-strong acid. Compounds of the carboxyl group react with all bases, both inorganic and organic (i.e., amines) releasing substantial heat, water and a salt that may be harmful. Incompatible with arsenic compounds (releases hydrogen cyanide gas), diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides (releasing heat, toxic, and possibly flammable gases), thiosulfates and dithionites (releasing hydrogen sulfate and oxides of sulfur). Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from silver compounds; strong alkalis; chlorites. Contact with some silver compounds forms explosive materials.

폐기물 처리

Pretreatment involves chemical reaction with limestone or calcium oxide forming calcium oxalate. This may then be incinerated utilizing particulate collection equipment to collect calcium oxide for recycling.

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