If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
P7994
Phosphate Buffer Powder
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| Pack Size | SKU | Availability | Price |
|---|
About This Item
form
powder (free-flowing)
Quality Level
pH
7.3-7.5 (0.017 g/mL in water, high purity)
solubility
water, high purity: 0.017 g/mL, clear, colorless
Application
Preparation Note
1 of 1
This Item | |||
|---|---|---|---|
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 200 |
| form powder (free-flowing) | form powder blend | form powder | form powder |
| solubility water, high purity: 0.017 g/mL, clear, colorless | solubility water, high purity: 20 ×, clear, colorless | solubility water: soluble | solubility water: soluble 0.5 g/mL |
| pH 7.3-7.5 (0.017 g/mL in water, high purity) | pH 7.2-7.6 (20 × in water, high purity, ambient) | pH 6.9-7.9 ( in water, 1 pouch dissolved in 100 ml) | pH 7.4-7.7 (25 °C, 0.1 M in water) |
Storage Class
11 - Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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Global Trade Item Number
| SKU | GTIN |
|---|---|
| P7994-1EA | 04061834400714 |
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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I'd like to create a 500ml solution. How much of the powder do I use? How much powder is in the jar to create 3.8L solution?
1 answer-
The 3.8 liter product made using this powder is 13.89 g/L potassium phosphate dibasic and 2.75 g/L potassium phosphate monobasic. Therefore, the -EA pack size contains 63 grams of powder.
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Bonjour, Comment préparer une solution de PBS 1x avec cette poudre?
1 answer-
This product is intended to be dissolved in 3.8 liters of water to prepare a 0.1 M phosphate solution, pH 7.4 at 25 °C. This product does not contain NaCl or KCl. It is suggested to purchase a powder preparation in which all components of 1X PBS are present such as item number P3813 for convenience.
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