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
31448
Sodium metabisulfite
puriss. p.a., ACS reagent, reag. Ph. Eur., dry, 98-100.5%
Synonym(s):
Sodium disulfite, Sodium pyrosulfite
Select a Size
| Size/SKU | Availability | Price |
|---|---|---|
500 g | Available to ship TODAYfromMILWAUKEE | $91.50 |
1 kg | Available to ship TODAYfromMILWAUKEE | $140.00 |
2.5 kg | Available to ship TODAYfromMILWAUKEE | $308.00 |
6 x 2.5 kg | Check Cart for Availability | $1,080.00 |
About This Item
Quality Segment
agency
reag. Ph. Eur.
grade
ACS reagent, puriss. p.a.
assay
98-100.5%
form
powder
quality
dry
impurities
≤0.01% thiosulfate (S2O3)
pH
3.5-5.0 (20 °C, 5%)
mp
>300 °C (lit.)
anion traces
chloride (Cl-): ≤50 mg/kg
cation traces
As: ≤0.5 mg/kg, Ca: ≤50 mg/kg, Cd: ≤50 mg/kg, Co: ≤50 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤100 mg/kg, Ni: ≤50 mg/kg, Pb: ≤5 mg/kg, Zn: ≤10 mg/kg
SMILES string
[Na+].[Na+].[O-]S(=O)S([O-])(=O)=O
InChI
1S/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
InChI key
HRZFUMHJMZEROT-UHFFFAOYSA-L
General description
1 of 1
This Item | |||
|---|---|---|---|
| description puriss. p.a., ACS reagent, reag. Ph. Eur., dry, 98-100.5% | description puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5% | description reagent grade, 97% | description anhydrous, free-flowing, Redi-Dri™, ReagentPlus®, ≥99% |
| form powder | form powder or crystals | form powder or crystals | form powder |
| assay 98-100.5% | assay 97-100.5% | assay 97% | assay ≥99% |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 100 |
| grade ACS reagent, puriss. p.a. | grade - | grade reagent grade | grade anhydrous |
| impurities ≤0.01% thiosulfate (S2O3) | impurities residue of solvents, complies, ≤0.02% thiosulfate (S2O3) | impurities - | impurities - |
| mp >300 °C (lit.) | mp >300 °C (lit.) | mp >300 °C (lit.) | mp >300 °C (lit.) |
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signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Eye Dam. 1
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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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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