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Merck

71504

Sodium phosphate monobasic monohydrate

puriss. p.a., ACS reagent, ≥99.0% (T)

Synonym(s):

Monosodium phosphate, Sodium dihydrogen phosphate monohydrate

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$307.00

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About This Item

Linear Formula:
NaH2PO4 · H2O
CAS Number:
Molecular Weight:
137.99
EC Number:
MDL number:
UNSPSC Code:
12352302
PubChem Substance ID:
NACRES:
NA.21
Assay:
≥99.0% (T)
Form:
crystals

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grade

ACS reagent
puriss. p.a.

Quality Level

Assay

≥99.0% (T)

form

crystals

impurities

≤0.001% total nitrogen (N)
≤0.01% insoluble matter

pH

4.1-4.5 (25 °C, 50 mg/mL in H2O)

anion traces

chloride (Cl-): ≤5 mg/kg
sulfate (SO42-): ≤30 mg/kg

cation traces

As: ≤0.5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg
heavy metals: ≤0.001% (by ICP-OES)

SMILES string

[Na+].[H]O[H].OP(O)([O-])=O

InChI

1S/Na.H3O4P.H2O/c;1-5(2,3)4;/h;(H3,1,2,3,4);1H2/q+1;;/p-1

InChI key

BBMHARZCALWXSL-UHFFFAOYSA-M

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Show Differences

1 of 4

This Item
S96381.06349567549
form

crystals

form

crystalline

form

solid

form

crystalline solid

assay

≥99.0% (T)

assay

≥98%, 98.0-102.0%

assay

-

assay

≥99% (titration)

Quality Level

200

Quality Level

200

Quality Level

500

Quality Level

100

grade

ACS reagent, puriss. p.a.

grade

ACS reagent

grade

-

grade

Molecular Biology

impurities

≤0.01% insoluble matter, ≤0.001% total nitrogen (N)

impurities

≤0.01% Insoluble matter

impurities

-

impurities

-

anion traces

chloride (Cl-): ≤5 mg/kg, sulfate (SO42-): ≤30 mg/kg

anion traces

chloride (Cl-): ≤5 ppm, sulfate (SO42-): ≤0.003%

anion traces

-

anion traces

-

General description

Sodium phosphate monobasic monohydrate is a sodium salt.

Application

Sodium phosphate monobasic monohydrate may be used in the following studies:
  • As a mobile phase in HPLC studies.[1]
  • For the dissolution of BSA (Bovine serum albumin).[2]
  • Preparation of buffer solutions.[3]

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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N Tsapis et al.
Proceedings of the National Academy of Sciences of the United States of America, 99(19), 12001-12005 (2002-08-30)
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P Yi et al.
The Journal of biological chemistry, 275(38), 29318-29323 (2000-07-08)
S-Adenosylmethionine and S-adenosylhomocysteine (SAH), as the substrate and product of essential cellular methyltransferase reactions, are important metabolic indicators of cellular methylation status. Chronic elevation of SAH, secondary to the homocysteine-mediated reversal of the SAH hydrolase reaction, reduces methylation of DNA
José Lopes-de-Araújo et al.
European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences, 123, 515-523 (2018-08-08)
Topotecan is a relatively large, planar, asymmetric and polar molecule with a lactone moiety. In neutral or basic aqueous solutions, this ring opens forming the carboxylate form of Topotecan that is biologically inactive and uncapable of passively cross membranes. Nevertheless
Inkyu Park et al.
Biosensors & bioelectronics, 22(9-10), 2065-2070 (2006-10-24)
A microneedle sensor platform with integrated silicon nanowire tip was developed for intracellular biochemical detection. Because of the virtue of miniaturized size and high sensitivity, this sensor has a great potential for studying individual cell or localized bioenvironment by revealing
Islem Gandouzi et al.
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Pyoverdine is a fluorescent siderophore produced by Pseudomonas aeruginosa that can be considered as a detectable marker in nosocomial infections. The presence of pyoverdine in water can be directly linked to the presence of the P. aeruginosa, thus being a

Questions

1–2 of 2 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. 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

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. 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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