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
799394
Sodium bisulfite
anhydrous, free-flowing, Redi-Dri™, ACS reagent
Synonym(s):
Sodium hydrogensulfite
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$40.40
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About This Item
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SMILES string
[Na+].OS([O-])=O
InChI
1S/Na.H2O3S/c;1-4(2)3/h;(H2,1,2,3)/q+1;/p-2
InChI key
DWAQJAXMDSEUJJ-UHFFFAOYSA-L
grade
ACS reagent, anhydrous
product line
Redi-Dri™
form
powder
quality
free-flowing
concentration
≥58.5% SO2
impurities
≤0.005% insolubles
pH
4.3 (10 g/L)
anion traces
chloride (Cl-): ≤0.02%
cation traces
Fe: ≤0.002%, heavy metals (as Pb): ≤0.001%
Quality Level
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Related Categories
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This Item | 243973 | 28-1970 | PHR1434 |
|---|---|---|---|
| form powder | form powder or crystals | form solid | form - |
| Quality Level 100 | Quality Level 200 | Quality Level - | Quality Level 300 |
| grade ACS reagent, anhydrous | grade ACS reagent | grade JIS special grade | grade certified reference material, pharmaceutical secondary standard |
| pH 4.3 (10 g/L) | pH 4.3 (10 g/L) | pH 4.3 (10 g/L) | pH - |
| impurities ≤0.005% insolubles | impurities ≤0.005% insolubles | impurities - | impurities - |
| cation traces Fe: ≤0.002%, heavy metals (as Pb): ≤0.001% | cation traces Fe: ≤0.002%, heavy metals (as Pb): ≤0.001% | cation traces - | cation traces - |
General description
Legal Information
signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Oral
supp_hazards
Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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Articles
Redi-Dri™ prevents hygroscopic powders, such as inorganic salts, from absorbing moisture and forming clumps, leaving the salts free-flowing every time.
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How can I determine the shelf life / expiration / retest date of this product?
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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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