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아세트산 나트륨

아세트산 나트륨
아세트산 나트륨 구조식 이미지
카스 번호:
127-09-3
한글명:
아세트산 나트륨
동의어(한글):
아세트산,나트륨염;나트륨아세트산무수물;무수물나트륨아세트산;아세트산나트륨;아세트산나트륨,무수;소듐아세테이트;아세트산나트륨,무수
상품명:
Sodium acetate
동의어(영문):
FEMA 3024;octansodny;NA ACETATE;Octan sodny;sodiiacetas;Natriumacetat;MAGGRAN(R) NA;femanumber3024;SODIUM ACETATE;MAGNESIA 87844
CBNumber:
CB1230044
분자식:
C2H3NaO2
포뮬러 무게:
82.03379
MOL 파일:
127-09-3.mol

아세트산 나트륨 속성

녹는점
>300 °C (dec.)(lit.)
밀도
1.01 g/mL at 20 °C
굴절률
1.4640
FEMA
3024 | SODIUM ACETATE
인화점
>250 °C
저장 조건
2-8°C
용해도
H2O: 3 M at 20 °C, clear, colorless
물리적 상태
powder
색상
white
수소이온지수(pH)
8.9 (25℃, 100mg/mL in water, 0.1 M agueous sodium acetate solution)
수용성
500 g/L (20 ºC)
감도
Hygroscopic
최대 파장(λmax)
λ: 260 nm Amax: 0.03
λ: 280 nm Amax: 0.02
Merck
14,8571
끓는 점
>400°C(decomposition)
BRN
3595639
안정성
Stable. Incompatible with strong oxidizing agents, halogens. Moisture sensitive.
InChIKey
VMHLLURERBWHNL-UHFFFAOYSA-M
CAS 데이터베이스
127-09-3(CAS DataBase Reference)
NIST
Sodium ethanoate(127-09-3)
EPA
Acetic acid, sodium salt(127-09-3)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
안전지침서 22-24/25
WGK 독일 1
RTECS 번호 AJ4300010
F 고인화성물질 3
자연 발화 온도 607 °C
TSCA Yes
HS 번호 29152200
유해 물질 데이터 127-09-3(Hazardous Substances Data)
독성 LD50 orally in Rabbit: 3530 mg/kg LD50 dermal Rabbit > 10000 mg/kg
그림문자(GHS):
신호 어:
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H303 삼키면 유해할 수 있음 급성 독성 물질 - 경구 구분 5 P312
예방조치문구:

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)

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

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.

화학적 성질

Sodium acetate, CH3COONa, also abbreviated NaOAc , also sodium ethanoate, is the sodium salt of acetic acid. This colourless salt has a wide range of uses.

화학적 성질

Sodium acetate is odorless or has a faint acetous odor. It effloresces in warm, dry air.

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.
Acidity regulation (Sodium acetate buffering)

용도

Sodium Acetate is a source of acetic acid that is obtained as crystals or powder. it has a solubility of 1 g in 0.8 ml of water.

용도

Sodium Acetate, Anhydrous is a source of acetic acid obtained as a granular powder. it has a solubility of 1 g in 2 ml of water.

용도

This colorless crystal, also known as sodium ethanoate or acetate of soda, was made by the reaction of acetic acid with sodium carbonate. It is soluble in water but less so in alcohol. Sodium acetate was used as a pH modifier for toning baths.

용도

Sodium acetate is a mordant in dyeing. Other applications are in photography, as an additive to food, in purification of glucose, in preservation of meat, in tanning, and as a dehydrating agent. In analytical chemistry it is used to prepare buffer solution.
Sodium acetate can be used to preserve processed meats and it is often used in combination with other acid based preservatives like lactates and propionates. The typical inclusion level is 0.2 to 0.5%. Sodium acetate is also used in salad dressings and ready-to-eat meals.

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

A white solid prepared by the neutralization of ethanoic acid with either sodium carbonate or sodium hydroxide. Sodium ethanoate reacts with sulfuric acid to form sodium hydrogensulfate and ethanoic acid; with sodium hydroxide it gives rise to sodium carbonate and methane. Sodium ethanoate is used in the dyeing industry.

주요 응용

2 - 1 - Industrial
Sodium acetate is used in the textile industry to neutralize sulfuric acid waste streams, and as a photoresist while using aniline dyes. It is also a pickling agent in chrome tanning, and it helps to retard vulcanization of chloroprene in synthetic rubber production. In processing cotton for disposable cotton pads, sodium acetate is used to eliminate the buildup of static electricity.
2 - 2 - Concrete longevity
Sodium acetate is used to reduce the damage water can potentially do to concrete by acting as a concrete sealant, while also being environmentally benign and cheaper than the epoxy alternative that is usually employed for sealing concrete against water permeation.
2 - 3 - Food
Sodium acetate may be added to foods as a seasoning. It may be used in the form of sodium diacetate — a 1:1 complex of sodium acetate and acetic acid, given the E-number E262. A frequent use is to impart a salt and vinegar flavor to potato chips.
2 - 4 - Buffer solution
As the conjugate base of acetic acid, a solution of sodium acetate and acetic acid can act as a buffer to keep a relatively constant pH.
2 - 5 - Heating pad
Sodium acetate is also used in consumer heating pads or hand warmers and is also used in hot ice. Sodium acetate trihydrate crystals melt at 58.4°C , (to 58°C ) dissolving in their water of crystallization. When they are heated to around 100°C, and subsequently allowed to cool, the aqueous solution becomes supersaturated. This solution is capable of cooling to room temperature with out forming crystals.

제조 방법

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.

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.

Chemical Synthesis

Acetic acid plus sodium bicarbonate makes sodium acetate plus carbonic acid. Produced by the neutralization of acetic acid with sodium bicarbonate, or by treating calcium acetate with sodium sulfate and sodium bicarbonate.

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


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