二亜硫酸二カリウム

ピロ亜硫酸カリウム · 二亜硫酸ジカリウム · メタ二亜硫酸カリウム · 二亜硫酸二カリウム · ピロ硫酸カリウム · メタ重亜硫酸カリウム · 二亜硫酸カリウム · メタ重亜硫酸カリウム(ピロ亜硫酸カリウム)

https://huagongshe.com/ja/chemical/28019

識別子と物理属性

CAS No.	16731-55-8
分子式	K2S2O5
平均分子量	222.33 g/mol
単同位体質量	221.84612846 g/mol
SMILES	O=S([O-])S(=O)(=O)[O-].[K+].[K+]
InChIKey	RWPGFSMJFRPDDP-UHFFFAOYSA-L
PubChem CID	28019
ChEMBL	CHEMBL2106901
EC No.	240-795-3
DTXSID	DTXSID1021293
現地名	二亜硫酸二カリウム

化学・物理的性質

極性表面積	125
水素結合供与体数	0
水素結合受容体数	6
回転可能結合数	0
重原子数	9
形式電荷	0
複雑度	136
物質分類	Other Classes -> Sulfites
化粧品	Cosmetic ingredients (Potassium Metabisulfite) -> CIR (Cosmetic Ingredient Review)Preservative
臭い	Sulfur dioxide odorPungent, sharp odor無臭
食品添加物	ANTIMICROBIAL AGENT, ANTIOXIDANT, COLOR OR COLORING ADJUNCT, DOUGH STRENGTHENER, FLOUR TREATING AGENT, OXIDIZING OR REDUCING AGENT -> FDA Substance added to food
密度	2.3 g/cu cmRelative density (water = 1): 2.342.3 @25 °C2.34 g/cm3
Color/Form	White crystals or crystalline powderWhite powder
溶解度	Freely soluble in waterinsoluble in alcoholReacts with acid solutionsinsoluble in ethanol49.5 g/100 g water at 25 °CSolubility in water, g/100ml at 25 °C: 49.5 (good)H2O: 0.1M at20℃、透明、無色水に溶ける。エタノールに不溶。
Decomposition	Potassium metabisulfite decomposes at temperatures above 150 °C. In the air, it oxidizes to the sulfate, more readily in the presents of moisture.When heated to decomposition it emits toxic fumes of /sulfur oxides/ and /potassium sulfate/.150°C
融点	Decomposes at approximately 150 °C190°C
Physical Description	Potassium metabisulfite appears as a white granular or powdery solid with a sharp odor of sulfur dioxide. Decomposes at 150 to 190 °C. Density 2.3 g / cm3. Contact severely irritates skin, eyes, and mucous membranes. Low toxicity. Used as a food preservative and an antioxidant.Dry PowderLarge CrystalsColourless crystals or white crystalline powderA white granular or powdery solid with a sharp odor of sulfur dioxide[CAMEO]WHITE CRYSTALLINE POWDER WITH PUNGENT ODOUR.
Stability/Shelf Life	When stored at a maximum temperature of 25 °C and a maximum relative humidity of 45%, the shelf life is 6 months.
Other Experimental Properties	Liberates SO2 with acidsoxidizes in air to sulfate, more readily in presence of moistureIt may catch fire if too much heat develops in powdering it.
蒸気密度	2.3 (vs air)
貯蔵条件	Store at +5°C to +30°C.
外観・状態	粉体・固形
色	白色～やや黄色
比重	2.3
pH	2.5-4.5 (25℃, 0.1M in H2O)
Merck	14,7645
化粧品成分の機能	還元剤ヘアウェーブとヘアストレート防腐剤
InChI	1S/2K.H2O5S2/c1-6(2)7(3,4)5/h(H,1,2)(H,3,4,5)/q2*+1/p-2
InChIKey	RWPGFSMJFRPDDP-UHFFFAOYSA-L
SMILES	[K+].[K+].[O-]S(=O)S([O-])(=O)=O
EPAの化学物質情報	Disulfurous acid, potassium salt (1:2) (16731-55-8)
Absorption	cut-off at 308nm in H2O at 0.1M

化学的特性

Potassium metabisulfite occurs as white or colorless free-flowing crystals, crystalline powder, or granules, usually with an odor of sulfur dioxide.

安全性と法規制

GHS 分類	This chemical does not meet GHS hazard criteria for 2.8% (43 of 1552) of reports.DangerH315 (90%): Causes skin irritation [Warning Skin corrosion/irritation]P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P354+P338, P317, P319, P321, P332+P317, P362+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 1552 reports by companies from 15 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
規制情報	Chemical: Disulfurous acid, dipotassium saltRegulation (EC) No 1935/2004 (amended)Disulfurous acid, potassium salt (1:2) is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Disulfurous acid, potassium salt (1:2) are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)Status: Active Update: 16-12-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/5221Potassium disulfite: Does not have an individual approval but may be used under an appropriate group standard
その他の安全情報	IMAP assessments - Sulfites: Human health tier II assessment
輸送ラベル（DOT）	Corrosive
火災危険	Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.
火災の可能性	It may catch fire if too much heat develops in powdering it.
健康有害性	Excerpt from ERG Guide 154 [Substances - Toxic and/or Corrosive (Non-Combustible)]:
有害性の概要	A case of occupational asthma, confirmed by specific inhalation challenge, was reported in a worker whose job was to sprinkle dry metabisulfite on potatoes. [Malo JL, Cartier A, Desjardins A. Occupational asthma caused by dry metabisulphite. Thorax 1995 May50(5)585-6.] Similar cases have been reported in the wine, laundry, and lobster fishing industries. [Madsen J, Sherson D, Kjoller H, Hansen I, Rasmussen K. Occupational asthma caused by sodium disulphite in Norwegian lobster fishing. Occup Environ Med 2004

用途

写真の現像における保恒剤として用いられる。

使用

Potassium Metabisulfite is a chemical preservative and antioxi- dant obtained as white or colorless crystals, powder, or granules. it is soluble in water and insoluble in alcohol. the sulfite salt yields sulfurous acid at a low ph. it is used as a food preservative.

一般的な説明

Potassium disulfite (Potassium metabisulfite, PMB) is an inorganic salt with antimicrobial properties. It is a sulfiting agent that prevents browning of foods.