Safety data sheet for Phosphoric acid
CAS 7664-38-2
This is the free preview of a draft SDS for Phosphoric acid — 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: Rust removal, food and beverage acidulant.
Draft safety data sheet — preview
Sections 1, 2, 9 of 16
- CAS number
- 7664-38-2
- Molecular formula
- H3PO4
- Molecular weight
- 97.995 g/mol
- Signal word
- Danger
Hazard classification
- GHS05 — Corrosive
- H290: May be corrosive to metals.
- H314: Causes severe skin burns and eye damage.
Section 1 — Identification
1.1 Product identifier
Product identifier: Phosphoric Acid
Chemical name (IUPAC): phosphoric acid
CAS number: 7664-38-2
PubChem CID reference: 1004
Synonyms: Phosphoric acid; ORTHOPHOSPHORIC ACID; o-Phosphoric acid; Wc-reiniger; Acidum phosphoricum; Sonac; Phosphorsaeure; Evits; Acide phosphorique; Phosphoricum acidum
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: Met. Corr. 1, Skin Corr. 1A.
Classification: Corrosive to Metals, Category 1 (Met. Corr. 1) [H290]
Classification: Skin Corrosion, Category 1A (Skin Corr. 1A) [H314]
2.2 Label elements
Signal word: Danger
GHS pictograms: GHS05 (Corrosion)
Hazard statement: H290: May be corrosive to metals.
Hazard statement: H314: Causes severe skin burns and eye damage.
Precautionary statement: P234: Keep only in original packaging.
Precautionary statement: P390: Absorb spillage to prevent material damage.
Precautionary statement: P260: Do not breathe dust/fume/gas/mist/vapors/spray.
Precautionary statement: P280: Wear protective gloves, protective clothing, eye protection, face protection, and hearing protection.
Precautionary statement: P264: Wash hands thoroughly after handling.
Precautionary statement: P303+P361+P353: IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
Precautionary statement: P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do - continue rinsing.
Precautionary statement: P301+P330+P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
Section 9 — Physical and Chemical Properties
9.1 Information on basic physical and chemical properties
Physical form: Solid
Appearance: Unstable orthorhombic crystals or clear syrupy liquid
Odor: Odorless
Boiling point: 158°C (316°F) at 1013 hPa
Melting point: 42.4°C (108°F)
Density: 1.8741 (100% solution); 1.6850 (85% solution); 1.334 (50% solution), all at 25 °C /Phosphoric acid solutions/
Vapor pressure: 0 hPa
Water solubility: Miscible
Log Pow (log Kow): -2.150
Vapor density: 1 (air = 1)
Viscosity: 3.86 mPa.s (40% solution at 20 °C)
pH: pH = 1.5 (0.1 N aqueous solution)
Not found in the public records searched: flash point, lower explosive limit, upper explosive limit and auto-ignition temperature. Enter these from your supplier's safety data sheet or your own test report before the draft is issued.
Occupational exposure limits for Phosphoric acid
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.
OSHA PEL — TWA (8 h)
1 mg/m³
OSHA Annotated PEL Table Z-1
NIOSH REL — TWA (up to 10 h)
1 mg/m³
OSHA Annotated PEL Table Z-1 (NIOSH REL column)
NIOSH REL — STEL (15 min)
3 mg/m³
OSHA Annotated PEL Table Z-1 (NIOSH REL column)
Where each value came from
- Odor — Hazardous Substances Data Bank (HSDB)
- Lewis, R.J. Sr.; Hawley's Condensed Chemical Dictionary 15th Edition. John Wiley & Sons, Inc. New York, NY 2007, p. 984
- View the record
- Melting point — Hazardous Substances Data Bank (HSDB)
- Lide, D.R. CRC Handbook of Chemistry and Physics 88th Edition 2007-2008. CRC Press, Taylor & Francis, Boca Raton, FL 2007, p. 4-80
- View the record
- Density — 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. 1266
- View the record
- Water solubility — The National Institute for Occupational Safety and Health (NIOSH)
- View the record
- Viscosity — Hazardous Substances Data Bank (HSDB)
- Environment Canada; Tech Info for Problem Spills: Phosphoric Acid (Draft) p.4 (1982)
- 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
- ECHA C&L Inventory — harmonised CLP entry
- Hazardous Substances Data Bank (HSDB)
- OSHA Annotated PEL Table Z-1
- OSHA Annotated PEL Table Z-1 (NIOSH REL column)
- PubChem — GHS classification
- PubChem — compound record
- PubChem — names and identifiers
- PubChem — regulatory information
- PubChem — toxicity data
- PubChem — transport information
- The National Institute for Occupational Safety and Health (NIOSH)
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 Phosphoric acid, and where each one comes from
30 measured values for 9 properties, read from 4 public databases. On 4 properties the records differ. Each reading is shown with its own record. Follow any record to read the value at its source.
Boiling point
5 records differ
Used with vapour pressure to judge how readily the substance reaches the air you breathe.
- 3.4 (Air = 1 at the boiling point of phosphoric acid)
- Hazardous Substances Data Bank (HSDB)
- 415 °F
- NIOSH Pocket Guide
- 407 °C @760 [mm Hg]
- PAC Chemical Database, U.S. Department of Energy
Melting point
6 records, -17 to 42 °C
Fixes the physical state at handling temperature, which the label and the transport class depend on.
- Melting point: 75% -17.5 °C; 80% 4.6 °C; 85% 21 °C
- Hazardous Substances Data Bank (HSDB)
- Hygroscopic; Latent heat of fusion = 10.5 kJ/mol at the melting point; Heat capacity at constant pressure = 106.2 J/mole (25 °C)
- Hazardous Substances Data Bank (HSDB)
- 108 °F
- NIOSH Pocket Guide
Vapour pressure
5 records differ
The higher it is, the faster the substance evaporates into the workplace air at room temperature.
- VP: Concentration in wt%, kPa (all at 20 °C): 0, 2.35; 5, 2.33; 10, 2.31; 20, 2.27; 30, 2.17; 50, 1.73; 75, 0.75; 85, 0.29; 100, 0.004
- Hazardous Substances Data Bank (HSDB)
- 0.0285 torr at 20 °C
- Hazardous Substances Data Bank (HSDB)
- 0.03 mmHg
- NIOSH Pocket Guide
- 0.03 mmHg
- OSHA Occupational Chemical Database
- 0.0285 [mm Hg] @20 °C
- PAC Chemical Database, U.S. Department of Energy
Density
6 records differ
Needed to convert between mass and volume on the label, in transport papers and in a spill estimate.
- 1.8741 (100% solution); 1.6850 (85% solution); 1.334 (50% solution), all at 25 °C /Phosphoric acid solutions/
- Hazardous Substances Data Bank (HSDB)
- Density at 25 °C: 75% 1.574; 80% 1.628; 85% 1.685
- Hazardous Substances Data Bank (HSDB)
- /Bulk density =/ 15.6 lb/gal. /Phosphoric acid, liquid or solution/
- Hazardous Substances Data Bank (HSDB)
- (77 °F): 1.87 (pure) 1.33 (50% solution)
- NIOSH Pocket Guide
- 1.87 (pure) 1.33 (50% solution)
- OSHA Occupational Chemical Database
- 1.834 @ 18°C
- PAC Chemical Database, U.S. Department of Energy
Solubility
4 records, each a different case
Determines spill behaviour, the right extinguishing media and the correct first-aid rinse.
- Soluble in water, alcohol; soluble in 8 volumes of 3:1 ether:alcohol mixture
- Hazardous Substances Data Bank (HSDB)
- Soluble in ethanol
- Hazardous Substances Data Bank (HSDB)
- 548 g/100 g water at 20 °C
- Hazardous Substances Data Bank (HSDB)
- Miscible
- NIOSH Pocket Guide
Viscosity
1 record
Governs how far a spill spreads and how fast it soaks into a surface or a sorbent.
- 3.86 mPa.s (40% solution at 20 °C)
- Hazardous Substances Data Bank (HSDB)
pH
1 record
Drives the skin and eye corrosion classification for solutions, alongside the corrosivity data.
- pH = 1.5 (0.1 N aqueous solution)
- 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.
Decomposition temperature
1 record
The temperature at which the substance breaks down, often into products more hazardous than itself.
- Decomposition products: converted to pyrophosphoric acid (H4P2O7) when heated to 213 °C
- Hazardous Substances Data Bank (HSDB)
These are the public records read for Phosphoric acid, 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 Phosphoric acid
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.