Safety data sheet for Sodium metabisulfite
CAS 7681-57-4
This is the free preview of a draft SDS for Sodium metabisulfite — Sections 1, 2 and 9, generated from the sources named below. The full 16-section draft, with your own company in Section 1, is $5 per document.
Typically documented by: Food and wine preservative, brewing.
Draft safety data sheet — preview
Sections 1, 2, 9 of 16
- CAS number
- 7681-57-4
- Molecular formula
- Na2O5S2
- Molecular weight
- 190.11 g/mol
- Signal word
- Danger
Hazard classification
- GHS05 — Corrosive
- GHS07 — Health hazard — irritant
- H302: Harmful if swallowed.
- H318: Causes serious eye damage.
Section 1 — Identification
1.1 Product identifier
Product identifier: Sodium Pyrosulfite
CAS number: 7681-57-4
PubChem CID reference: 656671
Synonyms: Sodium metabisulfite; Sodium pyrosulfite; Sodium disulfite; Disodium pyrosulfite; Natrii disulfis; Campden Tablets; Disodium metabisulfite; Natrium pyrosulfit; Natriummetabisulfit; sodium pyrosulphite
Section 2 — Hazards Identification
2.1 Classification of the substance or mixture
Classification basis: OSHA 29 CFR 1910.1200 Appendix A, aligned to the GHS Rev. 7 hazard classes this sheet resolves: Acute Tox. 4 (Oral), Eye Dam. 1.
Classification: Acute Toxicity, Category 4 — Oral (Acute Tox. 4 (Oral)) [H302]
Classification: Serious Eye Damage, Category 1 (Eye Dam. 1) [H318]
2.2 Label elements
Signal word: Danger
GHS pictograms: GHS05 (Corrosion), GHS07 (Exclamation)
Hazard statement: H302: Harmful if swallowed.
Hazard statement: H318: Causes serious eye damage.
Precautionary statement: P264+P265: Wash hands thoroughly after handling. Do not touch eyes.
Precautionary statement: P280: Wear protective gloves, protective clothing, eye protection, face protection, and hearing protection.
Precautionary statement: P270: Do not eat, drink or smoke when using this product.
Precautionary statement: P305+P354+P338: IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.
Precautionary statement: P301+P317: IF SWALLOWED: Get medical help.
Precautionary statement: P330: Rinse mouth.
Section 9 — Physical and Chemical Properties
9.1 Information on basic physical and chemical properties
Physical form: Solid
Appearance: White hexagonal crystals or powder
Odor: In the presences of traces of water, it develops an odor of sulfur dioxide
Melting point: 150°C (302°F)
Density: Specific gravity: 1.4 at 25 °C/4 °C
Water solubility: Solubility in water, g/100ml at 20 °C: 65 (good)
Log Pow (log Kow): -3.7
pH: Aqueous solution is acid
Not found in the public records searched: boiling point, flash point, vapor pressure, vapor density, lower explosive limit, upper explosive limit, auto-ignition temperature and viscosity. Enter these from your supplier's safety data sheet or your own test report before the draft is issued.
Occupational exposure limits for Sodium metabisulfite
The airborne limits on public record in the United States. These are transcribed from the tables named in each row, not derived. The full draft puts them in Section 8 with the control and PPE guidance.
NIOSH REL — TWA (up to 10 h)
5 mg/m³
NIOSH Pocket Guide to Chemical Hazards
Where each value came from
- Odor — Hazardous Substances Data Bank (HSDB)
- Weil ED et al; Kirk-Othmer Encyclopedia of Chemical Technology. (1999-2011). New York, NY: John Wiley & Sons; Sulfur Compounds. Online Posting Date: 16 Jun 2006
- View the record
- Density — Hazardous Substances Data Bank (HSDB)
- NIOSH. NIOSH Pocket Guide to Chemical Hazards & Other Databases CD-ROM. Department of Health & Human Services, Centers for Disease Prevention & Control. National Institute for Occupational Safety & Health. DHHS (NIOSH) Publication No. 2010-168 (2010)
- View the record
- Water solubility — Hazardous Substances Data Bank (HSDB)
- Same reference as odor above.
- View the record
- pH — Hazardous Substances Data Bank (HSDB)
- O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 2006, p. 1486
- View the record
A value with no row here was assembled from more than one record, so no single record is credited for it. The draft you buy carries this table as an appendix covering all 16 sections.
Sources
- Hazardous Substances Data Bank (HSDB)
- NIOSH Pocket Guide to Chemical Hazards
- PubChem — GHS classification
- PubChem — compound record
- PubChem — names and identifiers
- PubChem — regulatory information
- PubChem — toxicity data
- PubChem — transport information
Sections 1.3 and 1.4 are withheld here because the supplier and emergency contact blocks carry your own company details in the draft you buy. Every draft needs review by a competent person before it is issued.
Measured values for Sodium metabisulfite, and where each one comes from
13 measured values for 4 properties, read from 4 public databases. On 1 property the records differ. Each reading is shown with its own record. Follow any record to read the value at its source.
Melting point
3 records agree
Fixes the physical state at handling temperature, which the label and the transport class depend on.
- >302 °F (decomposes)
- Hazardous Substances Data Bank (HSDB)
- >302 °F (Decomposes)
- NIOSH Pocket Guide
- >302 °F (decomposes)
- OSHA Occupational Chemical Database
Density
4 records differ
Needed to convert between mass and volume on the label, in transport papers and in a spill estimate.
- Specific gravity: 1.4 at 25 °C/4 °C
- Hazardous Substances Data Bank (HSDB)
Solubility
5 records, each a different case
Determines spill behaviour, the right extinguishing media and the correct first-aid rinse.
- Freely soluble in water, glycerol; slightly soluble in alcohol
- Hazardous Substances Data Bank (HSDB)
- Soluble in ethanol
- Hazardous Substances Data Bank (HSDB)
- 66.7 g/100 g water at 25 °C
- Hazardous Substances Data Bank (HSDB)
- Very soluble in sodium bisulfite
- Hazardous Substances Data Bank (HSDB)
Odour
1 record
Odour is a warning property only. Many substances are hazardous well below the concentration you can smell.
- In the presences of traces of water, it develops an odor of sulfur dioxide
- Hazardous Substances Data Bank (HSDB)
These are the public records read for Sodium metabisulfite, published here unchanged. Where two records disagree, the draft you buy states the value and names the record behind it, so a reviewer can see what was chosen. Every draft needs review by a competent person before it is issued.
Get the full draft SDS for Sodium metabisulfite
The draft covers all 16 sections under OSHA 29 CFR 1910.1200 and GHS Rev. 7, or the CLP EC 1272/2008 layout for the EU. Each draft arrives as an editable .docx and a PDF with an appendix naming the source of each value, in about 60 seconds. $5 per document, no account.