りん酸水素ジナトリウム

危険有害性情報のコード(GHS)

• 絵表示(GHS)

  

• 注意喚起語

  Warning

• 危険有害性情報

  H315：皮膚刺激

  H319：強い眼刺激

  H335：呼吸器への刺激のおそれ

• 注意書き

  P261：粉じん/煙/ガス/ミスト/蒸気/スプレーの吸入を避ける こと。

  P304+P340：吸入した場合：空気の新鮮な場所に移し、呼吸しやすい 姿勢で休息させること。

  P305+P351+P338：眼に入った場合：水で数分間注意深く洗うこと。次にコ ンタクトレンズを着用していて容易に外せる場合は外す こと。その後も洗浄を続けること。

  P405：施錠して保管すること。

りん酸水素ジナトリウム 価格

MSDS Information

• Disodium hydrogenorthophosphate

りん酸水素ジナトリウム 化学特性,用途語,生産方法

• 外観

  白色の粉末

• 定義

  本品は、リン酸(*)の二ナトリウム塩であり、次の化学式で表される。
  参照表示名称：リン酸

• 溶解性

  水に可溶 (9.3g/100ml, 20℃), エタノールに難溶。水にやや溶けやすく、エタノールにやや溶けにくい。

• 解説

  リン酸水素二ナトリウム[disodium hydrogenphosphate]：Na2HPO4(141.96)．略称DSP．第二リン酸ナトリウム(primary sodium phosphate)，第二リン酸ソーダともいう．濃リン酸に1：2のモル比で水酸化ナトリウムまたは1：1のモル比で炭酸ナトリウムを加えて pH を8.0～9.0にし，濃縮すると得られる．無水和物，二，七，八，十二水和物が知られている．35 ℃ 以下では十二水和物，35～48 ℃ では七水和物，48～95 ℃ では二水和物，95 ℃ 以上では無水和物が得られる．無水和物は，無色の潮解性粉末．密度1.70 g cm－3．溶解度1.63 g/100 g 水(0 ℃)，12.14 g/100 g 水(25 ℃)．加熱すると240 ℃ で二リン酸ナトリウムNa4P2O7[CAS 7722-88-5]になる．二水和物は，無色の斜方晶系結晶．密度2.066 g cm－3．融点95 ℃．十二水和物は，無色の柱状または板状斜方晶系結晶．融点48 ℃．密度1.524 g cm－3．溶解度4.3 g/100 g 水(0 ℃)，76.7 g/100 g 水(30 ℃)．エタノールに不溶．110 ℃ に加熱すると二水和物に，180 ℃ で無水和物になる．水溶液は弱アルカリ性を示す．清涼な辛味を有する．洗剤，緩衝剤，かん水原料，食品添加物，食肉結着剤，工業用水の処理，醸造用添加剤，染色助剤，金属表面処理剤などに使用される．

• 用途

  pH標準液調製原料。

• 用途

  汎用試薬、調製液原料。

• 用途

  汎用試薬、調製液原料用。

• 化粧品の成分用途

  pH調整剤、腐蝕防止剤、緩衝剤、香料

• 使用上の注意

  吸湿性があり、湿った空気中で2分子又は7分子に相当する水を吸収する。

• 説明

  Sodium phosphate dibasic is highly hygroscopic and water soluble. Useful in conjunction with Sodium Phosphate, Monobasic in the preparation of biological buffers. It is commonly used in biological assay buffers. Sodium is required for nerve and muscle functioning. Sodium Phosphate Dibasic can be used as a dietary supplement and as a nutrient. Sodium hydrogen phosphate is used in food and water treatment in conjunction with trisodium phosphate.In foods, it is used to adjust pH. In water treatment, It retards calcium scale formation. It is also found in some detergents and cleaning agents. This product is known to be Used in many applications including the purification of antibodies. It is used as a saline laxative to treat constipation or to clean the bowel before a colonoscopy.

• 化学的特性

  The anhydrous compound is white crystalline powder; hygroscopic; density 1.70 g/cm3; converts to sodium pyrophosphate at 240°C; soluble in water; 874 SODIUM PHOSPHATE, DIBASIC insoluble in alcohol. The dihydrate is a crystalline powder or granular solid; density 2.066 g/cm3 at 15°C; loses water of crystallization at 92.5°C. The heptahydrate is a powdered or granular crystalline solid; density 1.679 g/cm3; loses five molecules of water at 48°C. The dodecahydrate is made up of translucent crystals or granules; density 1.524 g/cm3; readily loses five water molecules on exposure to air at ambient temperature; melts at 35°C when the salt contains all water of crystallization; loses all water at 100°C. All the hydrates are soluble in water and insoluble in alcohol.

• 物理的性質

  The anhydrous compound is white crystalline powder; hygroscopic; density 1.70 g/cm³; converts to sodium pyrophosphate at 240°C; soluble in water;insoluble in alcohol.
  The dihydrate is a crystalline powder or granular solid; density 2.066 g/cm³ at 15°C; loses water of crystallization at 92.5°C.
  The heptahydrate is a powdered or granular crystalline solid; density 1.679 g/cm³; loses five molecules of water at 48°C.
  The dodecahydrate is made up of translucent crystals or granules; density 1.524 g/cm³; readily loses five water molecules on exposure to air at ambient temperature; melts at 35°C when the salt contains all water of crystallization; loses all water at 100°C.
  All the hydrates are soluble in water and insoluble in alcohol.

• 天然物の起源

  Disodium phosphate is anhydrous or contains two molecules of water of hydration

• 使用

  Sodium Phosphate, Dibasic is used as a laboratory reagent and a buffer in chemical analysis. Other uses are in manufacturing ceramics, detergents, and enamels; as a mordant in dyeing; for fireproofing paper and wood; for weighting and printing silk; in the treatment of boiler water; as a sequestrant in food; as a dietary supplement; in soldering enamels; and in fertilizers. It is used therapeutically as a cathartic.

• 製造方法

  Dibasic sodium phosphate is prepared by treating phosphoric acid with a slight excess of sodium carbonate. The solution is boiled to expel carbon dioxide. Upon cooling dodecahydrate crystallizes out. Heating dodecahydrate at 100°C forms the anhydrous salt.
  H3PO4 + Na2CO3 → Na2HPO4 + CO2 + H2O
  Dibasic sodium phosphate also is prepared by reacting dibasic calcium phosphate with sodium carbonate. The product calcium carbonate precipitates leaving dibasic sodium salt in the solution. The solution on cooling yields crystals of hydrated product.
  CaHPO4 + Na2CO3 → CaCO3 + Na2HPO4

• 一般的な説明

  Sodium phosphate dibasic in combination with sodium phosphate monobasic is used in the preparation of oral sodium phosphate solution (OSPS), which is a purgative used for bowel cleansing before colonoscopy.

• 安全性プロファイル

  Poison by intravenous route. Moderately toxic by intraperitoneal, subcutaneous, and intramuscular routes. Mildly toxic by ingestion. A skin and eye irritant. When heated to decomposition it emits toxic fumes of POx and Na2O. See also PHOSPHATES.

• 純化方法

  Crystallise the salt twice from warm water, by cooling. Dry in air, then in an oven overnight at 130o. It should be dried before use as it is slightly hygroscopic. It forms di-, hepta-and deca-hydrates.

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