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
S9663
Sodium arsenate dibasic heptahydrate
ACS reagent, ≥98%
Synonym(s):
Disodium hydrogen arsenate heptahydrate, di-Sodium hydrogen arsenate heptahydrate
About This Item
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InChI
1S/AsH3O4.2Na.7H2O/c2-1(3,4)5;;;;;;;;;/h(H3,2,3,4,5);;;7*1H2/q;2*+1;;;;;;;/p-2
SMILES string
O.O.O.O.O.O.O.[Na+].[Na+].O[As]([O-])([O-])=O
InChI key
KOLXPEJIBITWIQ-UHFFFAOYSA-L
grade
ACS reagent
assay
≥98%, 98.0-102.0%
form
powder
impurities
≤0.005% Insoluble matter
pH
8.5-9 (25 °C, 50 g/L)
anion traces
arsenite (As2O3): ≤0.01%, chloride (Cl-): ≤0.001%, nitrate (NO3-): ≤0.005%, sulfate (SO42-): ≤0.01%
cation traces
Fe: ≤0.001%, heavy metals (as Pb): ≤0.002%
Quality Level
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This Item | |||
|---|---|---|---|
| form powder | form powder | form powder | form solid |
| assay ≥98%, 98.0-102.0% | assay ≥98.0% | assay 98.0-102.0% | assay ≥99.99% trace metals basis |
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 200 |
| grade ACS reagent | grade - | grade ACS reagent | grade - |
| anion traces arsenite (As2O3): ≤0.01%, nitrate (NO3-): ≤0.005%, chloride (Cl-): ≤0.001%, sulfate (SO42-): ≤0.01% | anion traces - | anion traces chloride (Cl-): ≤0.001%, sulfate (SO42-): ≤0.005% | anion traces chloride (Cl-): ≤0.001%, sulfate (SO42-): ≤0.005% |
| pH 8.5-9 (25 °C, 50 g/L) | pH 8.5-9.0 (25 °C, 50 g/L) | pH 8.7-9.3 (25 °C, 5% in solution) | pH 8.7-9.3 |
Application
signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 3 Inhalation - Acute Tox. 3 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Carc. 1A
Storage Class
6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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