Sodium metabisulfite
SIGALD/799343 - anhydrous, free-flowing, Redi-Dri™, ReagentPlus®, ≥99%
Synonym: Sodium disulfite; Sodium pyrosulfite
CAS Number: 7681-57-4
Empirical Formula (Hill Notation): Na2O5S2
Molecular Weight: 190.11
EC Number: 231-673-0
MDL Number: MFCD00167602
Linear Formula: Na2S2O5
Product Type: Chemical
The Redi-Dri™ packaging system eliminates the common issue of clumping that is noted with many hygroscopic salts and buffers and provides free-flowing, ready-to- use material at all times.
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 799343-500G
This image depicts SKU: 799343-500G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 799343-1KG
This image depicts SKU: 799343-1KG
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 799343-2.5KG
This image depicts SKU: 799343-2.5KG
| assay | ≥99% |
| form | powder |
| grade | anhydrous |
| InChI | 1S/2Na.H2O5S2/c;;1-6(2)7( |
| InChI key | HRZFUMHJMZEROT-UHFFFAOYSA |
| mp | >300 °C (lit.) |
| product line | ReagentPlus® |
| Redi-Dri™ | |
| quality | free-flowing |
| Quality Level | 100  |
| SMILES string | [Na+].[Na+].[O-]S(=O)S([O |
| Features and Benefits: | • Increased efficiency – Eliminate time and effort of loosening hardened powders • Safety – Avoid risks of using tools of force to break up clumps • Economy – Faster preparation and solvation increase productivity and reduce costs • Assured quality – Excellent, expert-tested quality with no anti-caking agents • Flexible volumes – Available from research amounts to scale-up quantities |
| General description: | Redi-Dri™ technology eliminates clumping and the need for complicated procedures to keep your salts free-flowing. Keeping your salts dry helps improve your results by giving accurate measurements and easier-to-handle salts and buffers. Rather than drying your salts in an oven or desiccator or breaking them apart manually, Redi-Dri™ ensures that your salts will remain easy-to-use for months without worrying about anti-caking agents. Even after repeated openings you can be assured that your results are always accurate. Redi-Dri™ saves you time, energy and money by keeping your salts usable for longer! |
| Legal Information: | ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany |
| Legal Information: | Redi-Dri is a trademark of Sigma-Aldrich Co. LLC |
| Other Notes: | As a solid, this product is sodium metabisulfite, Na2S2O5. Dissolved in water, it yields NaHSO3. |
| Packaging: | 1, 2.5 kg in poly bottle |
| Packaging: | 500 g in poly bottle |
| Symbol |   GHS05,GHS07,GHS05,GHS07 |
| Signal word | Danger-Danger |
| Hazard statements | H302 - H318 - H302 - H318 |
| Precautionary statements | P280 - P264 - P270 - P280 - P301 + P312 + P330 - P305 + P351 + P338 + P310 - P301 + P312 - P305 + P351 + P338 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Supplemental Hazard Statements | EUH031EUH031 |
| Purity | ≥99% |
| mp | >300 °C (lit.) |
| UNSPSC | 12352302 |