产品实物拍摄图：（每个批次的保质期不同，图片上的保质期只是拍摄照片时候的不代表发货的保质期，店家会选择最新批次的发货）

• 中文名称：5´－二***酸腺苷二钠(ADP Na2)
• 英文名称：Adenosine-5-Diphosphate Disodium Salt (ADP Na2)
• 产地：Amresco0160
• 分子式：C10H13N5Na2O10P2.2H2O
  分子量：507.20
   
• CAS号：16178-48-6
  级别：Ultra Pure Grade
   
• EINECS编号：240-314-7
  MDL编号：MFCD00066635
   储存条件：－15～－20℃
• 中文别名：ADP钠盐、二***酸腺苷二钠盐、腺苷-5′-二***酸二钠盐、5ˊ-二***酸腺苷二钠盐、腺苷-5ˊ-二***酸二钠盐、二***酸腺苷二钠、腺苷-5-二***酸钠盐水合物ient: EmM = 15.4 (259 nm in 100 mM

  phosphate buffer, pH 7.0).

  Product Description

  Adenosine 5-triphosphate (ATP) and its phosphate bonds are the basic components of energy exchange in many biological systems. The purification and crystallization of ATP from equine muscle led to the entry of the Sigma Chemical Company into the research biochemical field. Sigma became the first to offer stable, crystalline ATP with a purity approaching 100%. The initial products were isolated from muscle tissue and precipitated with ethanol.1 Currently, this product is isolated from a microbial source and is produced via a fermentation process. No chemical phosphorylation is involved.

  Trace elemental analyses have been performed on the SigmaUltra ATP. The certificate of analysis provides lot specific results. SigmaUltra ATP is for applications, which require tight control of elemental content.

  This preparation of ATP is recommended for use as an ATP standard in bioluminescence assays. The recommended ATP products for standards in bioluminescence experiments are sodium salts of ATP: Product No. A 7699 (packaged in bulk, to be weighed by the user) and Product Code FL-AAS, preweighed vials equivalent to 1.0 mg of ATP (2 ìmole).

  ATP has intrinsic metal binding affinity. The binding constant for various metals are (given as per mole):2 Mg2+ (9,554), Na+ (13), Ca2+ (3,722), K+ (8), Sr2+ (1,381), Li+ (25).

  Precautions and Disclaimer

  For Laboratory Use Only. Not for drug, household or other uses.

  Preparation Instructions

  ATP is soluble in water (50 mg/ml), yielding a clear, colorless solution. This solution is mildly acidic (pH approximately 3.5).

  Storage/Stability

  The product is routinely shipped at ambient temperature without degradation. It is recommended to store the product at –0 °C with desiccation. A very slow dismutation occurs in the powdered product with 2 ATP molecules forming ADP and adenosine 5’-tetraphosphate. A decomposition of less than 0.5% per year is observed. The product is stable for at least 2 years.

  Aqueous solutions of ATP are stable for months when frozen at –15 °C and for approximately one week at 0 °C. ADP is the first hydrolysis product formed, with

  additional hydrolysis leading to the formation of AMP. However, ATP solutions are only stable for several hours at 0 ºC when dissolved in a trichloroacetic acid solution. In alkaline solution, it rapidly decomposes to inorganic pyrophosphate and adenosine 5-phosphate even at 0 °C.3

  Ordering Information

  Description	Quantity	Price(RMB)	促销价	Cat. no.	产地
  ATP disodium salt	1 g	862.29	420	A7699	Sigma
  	5 g	2,290.00	1560	A7699	Sigma