구연산 나트륨, 무수
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구연산 나트륨, 무수 속성
- 녹는점
- 300°C
- 밀도
- 1.008 g/mL at 20 °C
- 저장 조건
- 2-8°C
- 용해도
- 물(약간 용해됨)
- 물리적 상태
- 액체
- 색상
- 흰색에서 황백색까지
- 수소이온지수(pH)
- 8.59(1 mM solution);8.9(10 mM solution);9.04(100 mM solution);9.26(1000 mM solution)
- 냄새
- 100.00%. 냄새 없는
- 수용성
- 물에 용해됩니다.
- 감도
- Hygroscopic
- 최대 파장(λmax)
- λ: 260 nm Amax: ≤0.1
- 안정성
- 흡습성
- InChIKey
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K
- LogP
- -0.280 (est)
- CAS 데이터베이스
- 68-04-2(CAS DataBase Reference)
안전
- 위험 및 안전 성명
- 위험 및 사전주의 사항 (GHS)
| 위험품 표기 | Xi,C | ||
|---|---|---|---|
| 위험 카페고리 넘버 | 22-40-48/20/22-41-37/38-36-35 | ||
| 안전지침서 | 36-24/25-39-26-45-36/37/39 | ||
| WGK 독일 | 2 | ||
| RTECS 번호 | GE8300000 | ||
| F 고인화성물질 | 34 | ||
| TSCA | Yes | ||
| HS 번호 | 29181500 | ||
| 유해 물질 데이터 | 68-04-2(Hazardous Substances Data) | ||
| 독성 | LD50 in rats, mice (mmol/kg): 6.0, 5.5 i.p. (Gruber, Halbeisen) | ||
| 기존화학 물질 | KE-20843 |
구연산 나트륨, 무수 C화학적 특성, 용도, 생산
순도시험
순도시험 (1) 용상 : 이 품목 1g을 물 20mL에 녹일 때, 그 액은 무색이며 탁도는 거의 징명 이하이어야 한다.
(2) 액성 : 이 품목의 수용액(1→20)의 pH는 7.6～9.0이어야 한다.
(3) 황산염 : 이 품목 1g을 취하여 황산염시험법에 따라 시험할 때, 그 양은 0.01N 황산 0.5mL에 대응하는 양 이하이어야 한다.
(4) 비소 : 이 품목을 비소시험법에 따라 시험할 때, 그 양은 1.3ppm 이하이어야 한다.
(5) 납 : 이 품목 5.0g을 취하여 원자흡광광도법 또는 유도결합플라즈마발광광도법에 따라 시험할 때, 그 양은 1.0ppm 이하이어야 한다.
(6) 수은 : 이 품목을 수은시험법에 따라 시험할 때, 그 양은 1.0ppm 이하이어야 한다.
확인시험
이 품목은 확인시험법 중 구연산염 및 나트륨염의 반응을 나타낸다.
정량법
이 품목을 180℃에서 2시간 건조한 다음 약 0.2g을 정밀히 달아 빙초산(비수적정용) 30mL를 가하여 가온하면서 녹이고 식힌 다음 0.1N 과염소산용액으로 적정한다(지시약 : 크리스탈바이올렛․빙초산시액 1mL). 종말점은 액의 자색이 청색을 지나 녹색으로 변하는 점이다. 따로 같은 방법으로 공시험을 한다.
0.1N 과염소산용액 1mL ＝ 8.602mg C6H5O7Na3
정의
이 품목에는 결정물(2수염, 5수염) 및 무수물이 있고, 각각을 구연산삼나트륨(결정) 및 구연산삼나트륨(무수)라 칭한다.
개요
Sodium citrate may refer to any of the sodium salts of citric acid (though most commonly the third):Mono sodium citrate
Di sodium citrate
Tri sodium citrate
As food additives, the 3 forms of the salt are also collectively known by the E number E331.
화학적 성질
Sodium citrate is odorless and has a pleasant, acid taste. Sodium citrate is anhydrous or contains two molecules of water of crystallization출처
Citric acid and its salts occur naturally in many plants and animals.용도
sodium citrate may be used in cosmetic formulations as an alkalizer and to bind trace metals in solutions (by means of a chelating action). It is the sodium salt of citric acid.제조 방법
Produced by the neutralization of citric acid with sodium hydroxide or sodium carbonate. May be prepared in an anhydrous state or may contain 2 mole of water per mole of sodium citrate.주요 응용
2 – 1 - FoodSodium citrate is chiefly used as a food additive E331, usually for flavor or as a preservative. Sodium citrate is employed as a flavoring agent in certain varieties of club soda. Sodium citrate is common as an ingredient in Bratwurst, and is also used in commercial ready to drink beverages and drink mixes, contributing a tart flavour.
2 – 2 - Buffer
As a conjugate base of a weak acid, citrate can perform as a buffering agent or acidity regulator, resisting changes in pH. Sodium citrate is used to control acidity in some substances, such as gelatin desserts. It can be found in the mini milk containers used with coffee machines. The compound is the product of antacids, such as Alka- Seltzer, when they are dissolved in water.
2 – 3 - Medical uses
In 1914, the Belgian doctor Albert Hustin and the Argentine physician and researcher Luis Agote successfully used sodium citrate as an anticoagulant in blood transfusions. It continues to be used today in blood collection tubes and for the preservation of blood in blood banks. The citrate ion chelates calcium ions in the blood by forming calcium citrate complexes, disrupting the blood clotting mechanism.
Sodium citrate is used to relieve discomfort in urinary tract infections, such as cystitis, to reduce the acidosis seen in distal renal tubular acidosis, and can also be used as an osmotic laxative. It is a major component of the WHO Oral Rehydration Solution.
일반 설명
Citric acid trisodium salt corresponds to a molecular weight of 258 Da. It has high sodium content and sieving coefficients.Food additive
Sodium citrate is some times used as an acidity regulator in drinks, and also as an emulsifier for oils when making cheese. It allows the cheeses to melt with out becoming greasy. Consider the following quote from Modernist Cuisine:Our modernist version of mac and cheese owes its chemistry to James L. Kraft, who in 1916 patented the first American cheese slice. He showed that sodium phosphate keeps the water and fat droplets mixed when the cheese is melted. We use sodium citrate, which has the same effect and is easier to find. The resulting texture is as smooth as melted American cheese, but as complex and intense in flavor as any of your favorite cheeses.
Purification Methods
Crystallise the salt from warm water by cooling to 0o. [Beilstein 3 III 1100, 3 IV 1274.]구연산 나트륨, 무수 준비 용품 및 원자재
원자재
준비 용품
구연산 나트륨, 무수 공급 업체
글로벌( 794)공급 업체
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