아세트산 나트륨

아세트산 나트륨 속성

아세트산 나트륨 MSDS

Sodium acetate

아세트산 나트륨 C화학적 특성, 용도, 생산

물성

백색의 결정성분말 또는 덩어리이고 냄새가 없거나 신냄새가 있다(무수화물) 무색투명의 결정 또는 백색의 결정성분말이다(3수화물), pH 7.5~9.5, 녹는점 324℃(무수화물) 79℃(3수화물), 끓는점 881.4℃(무수화물) 120~123℃(3수화물), 인화점 >250℃(무수화물) 300℃(3수화물), 용해도 465g/ℓ(무수화물) 49781㎎/ℓ(3수화물), 비중 1.528 (무수화물) 1.4442 (3수화물), 분자량 82.04(무수화물) 137.11(3수화물)

순도시험

  (1) 용상 : 이 품목 1g을 취하여 물 20mL에 녹일 때, 그 액은 무색으로서 탁도는 징명하여야 한다.

  (2) 유리산 및 유리알칼리 : 결정물일 때는 2g, 무수물일 때는 1.2g을 취하여 새로 끓여서 식힌 물 20mL에 녹여 페놀프탈레인시액 2방울을 가한 다음 10℃로 유지하여 다음의 시험을 행한다.

    ① 액이 무색이면, 0.1N 수산화나트륨용액 0.1mL를 가할 때, 홍색을 나타내어야 한다.

    ② 액이 홍색이면, 그 색은 0.1N 염산 0.1mL를 가할 때, 없어져야 한다.

  (3) 비소 : 이 품목을 비소시험법에 따라 시험할 때, 그 양은 4.0ppm 이하이어야 한다.

  (4) 납 : 이 품목 5.0g을 취하여 원자흡광광도법 또는 유도결합플라즈마발광광도법에 따라 시험할 때, 그 양은 2.0ppm 이하이어야 한다.

  (5) 수은 : 이 품목을 수은시험법에 따라 시험할 때, 그 양은 1.0ppm 이하이어야 한다.

확인시험

  (1) 이 품목을 서서히 가열하면 용해되고 다음에 분해하여 아세톤의 냄새가 난다. 또 잔류물의 수용액은 알칼리성이다.

  (2) 이 품목은 확인시험법 중 나트륨염 및 초산염의 반응을 나타낸다.

정량법

  이 품목을 건조한 다음 약 0.2g을 정밀히 달아 초산 40mL를 가하여 녹이고 0.1N 과염소산용액으로 적정한다. 종말점의 확인은 보통 전위차를 이용한다(지시약 : 크리스탈바이올렛․빙초산시액 1mL). 다만, 종말점은 액의 자색이 청색을 지나 녹색으로 변할 때로 한다. 따로 공시험을 행하여 보정한다.

0.1N 과염소산용액 1mL ＝ 8.203mg C₂H₃NaO₂

정의

  이 품목에는 결정물(3수염) 및 무수물이 있고, 각각을 초산나트륨(결정) 및 초산나트륨(무수)이라 칭한다.

개요

Sodium acetate (CH3COONa) is the sodium salt of acetic acid. It appears as a colorless deliquescent salt with a wide range of applications. In industry, it can be used in textile industry to neutralize sulfuric acid waste streams and as a photoresist upon using aniline dyes. In concrete industry, it can be used as a concrete sealant to mitigate the water damage. In food, it can be used as a seasoning. It can also be used as a buffer solution in lab. In addition, it is also used in heating pads, hand warmers and hot ice. For laboratory use, it can be produced by the reaction between acetate with the sodium carbonate, sodium bicarbonate and sodium hydroxide. In industry, it is prepared from the glacial acetic acid and sodium hydroxide.

화학적 성질

Sodium acetate, CH3COONa, also abbreviated NaOAc , also sodium ethanoate, is the sodium salt of acetic acid, was made by the reaction of acetic acid with sodium carbonate. It is soluble in water but less so in alcohol. This colourless salt has a wide range of uses. Sodium acetate was used as a pH modifier for toning baths.

물리적 성질

Anhydrous salt is a colorless crystalline solid; density 1.528 g/cm³; melts at 324°C; very soluble in water; moderately soluble in ethanol. The colorless crystalline trihydrate has a density 1.45 g/cm³; decomposes at 58°C; is very soluble in water; pH of 0.1M aqueous solution is 8.9; moderately soluble in ethanol, 5.3 g/100mL.

출처

Acetic acid or acetates are present in most plant and animal tissues in small, but detectable amounts

용도

Used as buffers.
Acidity regulation (buffering)
Sodium acetate mixed with acetic acid forms a pH buffer, which can be used to stabilise the pH of foods in the pH-range from 3 to 6. The table below gives indicative values of the composition needed to give a certain pH. The mixtures below can be diluted at least 10 times with minimum effect on pH, however, the stability decreases.

제조 방법

Sodium acetate is prepared by reacting sodium hydroxide or sodium carbonate with acetic acid in aqueous solution. The solution is evaporated to obtain hydrated crystals of sodium acetate.
NaOH + CH3COOH → CH3COONa + H2O
Na2CO3 + CH3COOH → 2CH3COONa + CO2 + H2O

정의

ChEBI: Sodium acetate is an organic sodium salt. It contains an acetate.

Synthesis

For laboratory use, sodium acetate is very inexpensive, and is usually purchased instead of being synthesized. It is sometimes produced in a laboratory experiment by the reaction of acetic acid (ethanoic acid) with sodium carbonate, sodium bicarbonate, or sodium hydroxide. These reactions produce aqueous sodium acetate and water. Carbon dioxide is produced in the reaction with sodium carbonate and bicarbonate, and it leaves the reaction vessel as a gas (unless the reaction vessel is pressurized). This is the well-known "volcano" reaction between baking soda (sodium bicarbonate) and vinegar.
CH₃COOH + NaHCO₃ → CH₃COONa + H₂O + CO₂
Industrially, sodium acetate is prepared from glacial acetic acid and sodium hydroxide.
CH₃COOH + NaOH → CH₃COONa + H₂O.

화학 반응

Sodium acetate can be used to form an ester with an alkyl halide such as bromo ethane:
CH₃COONa + Br CH₂CH₃→ CH₃COOCH₂CH₃+ NaBr
Caesium salts catalyze this reaction.

일반 설명

Sodium Acetate is reported to inhibit the growth of Listeria monocytogenes.

반응 프로필

When sodium acetate reacts with strong acids, irritating, noxious vapors of acetic acid are usually produced. Sodium acetate is sufficiently basic to catalyze the violent polymerization of diketene, perhaps as well as other reactive dimers that are susceptible to polymerization in the presence of a mild base.

생물학적 활성

Commonly used laboratory reagent

Safety Profile

Poison by intravenous route. Moderately toxic by ingestion. A skin and eye irritant. Migrates to food from packagmg materials. Violent reaction with F2, m03, diketene. When heated to decomposition it emits toxic fumes of Na2O.

Purification Methods

Crystallise it from acetic acid and keep it under vacuum for 10hours at 120o. Alternatively, it is crystallised from aqueous EtOH, as the trihydrate. This material can be converted to anhydrous salt by heating slowly in a porcelain, nickel or iron dish, so that the salt liquefies. Steam is evolved and the mass again solidifies. Heating is now increased so that the salt melts again. (NB: if it is heated too strongly, the salt can char; avoid this.) After several minutes, the salt is allowed to solidify and is cooled to a convenient temperature (in a desiccator) before being powdered and bottled. The water content should now be less than 0.02%. [Beilstein 2 II 113, 2 III 184, 2 IV 109.]

아세트산 나트륨 준비 용품 및 원자재

원자재

준비 용품

아세트산 나트륨 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Jiangsu Kolod Food Ingredients Co.,Ltd.	+86-518-85110578 +8618805133257	sales3257@jskolod.com	China	132	60
Shanghai UCHEM Inc.	+862156762820 +86-13564624040	sales@myuchem.com	China	7433	58
Henan Fengda Chemical Co., Ltd	+86-371-86557731 +86-13613820652	info@fdachem.com	China	20288	58
Hebei Saisier Technology Co., LTD	+86-18400010335 +86-18034520335	admin@hbsaisier.cn	China	1015	58
Aladdin Scientific	+1-+1(833)-552-7181	sales@aladdinsci.com	United States	57505	58
HebeiShuoshengImportandExportco.,Ltd	+86-18532138899 +86-18532138899	L18532138899@163.com	China	939	58
SHANGHAI KEAN TECHNOLOGY CO., LTD.	+8613817748580	cooperation@kean-chem.com	China	40066	58
Wuhan Boyuan Import & Export Co., LTD	+8615175982296	Mike@whby-chem.com	China	33	58
Shaanxi Dideu Medichem Co. Ltd	+86-29-81148696 +86-15536356810	1022@dideu.com	China	3882	58
Nanjing Deda New Material Technology Co., Ltd	+8613223293093	bella@njdeda.com	China	80	58

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