Improving Member States preparedness to face an HNS pollution of the Marine System (HNS-MS)
Phosphoric Acid
Description Top
| CAS number | 7664-38-2 |
| UN number | 1805 |
| Chemical formula | H3PO4 |
| Accident occurred | Yes |
| Standard European Behaviour Classification (SEBC) | Dissolves (D) |
| Abilities | Miscible in water. |
| Notable risks | Reacts to heat Reacts with other compouds. |
GESAMP Hazard profile
| A1 | A2 | B1 | B2 | C1 | C2 | C3 | D1 | D2 | D3 | E1 | E2 | E3 |
| 0 | NI | 1 | NI | 1 | 1 | 3 | 3 | 3 | NI | D | 3 |
Marine pollution Classification (MARPOL Annex II)
| Category | Description |
| Z | Noxious Liquid Substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a minor hazard to either marine resources or human health and therefore justify less stringent restrictions on the quality and quantity of the discharge into the marine environment. |
Alternate names for this chemical
Orthophosphoric Acid
O-Phosphoric Acid
White Phosphoric Acid
Phosphoric Acid
Hydrogen Phosphate
Acide Phosphorique
O-Phosphoric Acid
White Phosphoric Acid
Phosphoric Acid
Hydrogen Phosphate
Acide Phosphorique
Physico-chemical properties Top
| Chemical formula | H3PO4 | ||
| Molar mass | 97.99 [g/mol] | ||
| State | Liquid at 25°C and 1 atm | ||
| Fusion temperature | 42.4 [°C] | ||
| Boiling temperature | 260 [°C] | ||
| Density |
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| Kinematic viscosity |
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| Hydrosolubility |
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| Specific heat capacity | 1480 [J/(Kg·K)] | ||
| Henry's constant | 0 [mol/(m³·Pa)] |
Behaviour Top
| Log Kow | 0.21 |
| Log Koc | 1.21 |
| Hydrolysis (Half-life) | 1 day |
| Aqueous photolysis (Half-life) | Not photolysable |
| Biodegradation in estuary environment (Half-life) | Not biodegradable |
| Biodegradation in marine environment (Half-life) | Not biodegradable |
| Standard European Behaviour Classification (SEBC) | Dissolves (D) |
Ecotoxicity Top
| Highest no observed effect concentration (NOEC) on algae | 100 [mg/l] |
| Highest no observed effect concentration (NOEC) on crustacean | 56 [mg/l] |
Hazards Top
Danger
| IDLH | 1000 [ppm] |
Hazards statements
Health
H314
Causes severe skin burns and eye damage.
Precautionary statements
Prevention
P280
Wear protective gloves/protective clothing/eye protection/face protection.
Response
P303 + P361 + P353
IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.
P305 + P351 + P338
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
GESAMP Top
GESAMP Hazard profile
| A1 | A2 | B1 | B2 | C1 | C2 | C3 | D1 | D2 | D3 | E1 | E2 | E3 |
| 0 | NI | 1 | NI | 1 | 1 | 3 | 3 | 3 | NI | D | 3 |
A1: Bioaccumulation
| Rating | Description |
| 0 | No potential to bioaccumulate |
A1a:
| Rating | Description | Criteria [mg/l] |
| 0 | No potential to bioaccumulate | Log Kow < 1 |
A1b:
| Rating | Description |
| NI | No Information |
A2: Biodegradation
| Rating | Description |
| NI | No Information |
B1: Acute aquatic toxicity
| Rating | Description | Criteria [mg/l] |
| 1 | Practically non-toxic | 100 < LC/EC/IC50 ≤ 1000 |
B2: Chronic aquatic toxicity
| Rating | Description |
| NI | No Information |
C1: Acute oral toxicity
| Rating | Description | Criteria [mg/Kg] |
| 1 | Slight | 300 < AOTE ≤ 2000 |
C2: Acute dermal toxicity (skin contact)
| Rating | Description | Criteria [mg/Kg] |
| 1 | Slight | 1000 < ADTE ≤ 2000 |
C3: Acute inhalation toxicity
| Rating | Description | Criteria [mg/l] (4 hours exposure) |
| 3 | Moderately high | 0.5 < AITE ≤ 2 |
D1: Skin irritation or corrosion
| Rating | Description | Sign | GHS category |
| 3 | Severely irritating or corrosive | Severe irritation indi | Corrosive Category 1 |
D2: Eye irritation
| Rating | Description | Sign | GHS category |
| 3 | Severely irritating or corrosive | Severe conjunctoblepha | Irritant Category 1 |
D3: Long-term health effects
| Notation | Hazard endpoint | Description | GHS category |
| No Information |
E1: Tainting of seafood
| Rating | Description |
| NI | No Information |
E2: Behaviour of chemicals in the marine environment
| Rating | Description |
| D | Dissolves |
E3: Interference with the use of coastal amenities
| Rating | Interference | Description | Interpretation | Warning |
| 3 | Highly objectionable | 1 is highly acutely toxic; and/or 2 is severely irritant or corrosive to skin or eyes; and/or 3 is carcinogenic, mutagenic or reprotoxic; and/or 4 is a floater or persistent floater with associated health effects | 1 C1 and/or C2 and/or C3 = 4; and/or 2 D1 or D2 = 3, 3A, 3B, or 3C; and/or 3 D3 contains C, M or R; and/or 4 E2 = F or Fp and D3 contains Ss, Sr, T, A, N, or I | Warning issued leading to the closure of amenities |
GHS Security Information
Danger
About the project
HNS-MS is a decision-support tool that Belgian and French maritime authorities as well as coastguard stations can activate in order to forecast the drift, fate and behavior of acute marine pollution by Harmful Noxious Substances (HNS) accidentally released in the marine system.
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Copyright © 2015–2025 HNS-MS Consortium
HNS-MS has been funded by DG-ECHO under agreement ECHO/SUB/2014/693705 and runs from 1 January 2015 to 31 March 2017.