EU flagHNS-MS has been funded by DG-ECHO under agreement ECHO/SUB/2014/693705

Improving Member States preparedness to face an HNS pollution of the Marine System (HNS-MS)

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Nitric Acid

Description Top

CAS number 7697-37-2
Chemical formula HNO3
Standard European Behaviour Classification (SEBC) Dissolves (D)
Abilities Miscible in water.
GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
0 NI 2 NI 3 1 3 3C 3 NI D 3

Marine pollution Classification (MARPOL Annex II)
Category Description
Y Noxious Liquid Substances which, if discharged into the sea from tank cleaning or deballasting operations, are deemed to present a hazard to either marine resources or human health or cause harm to amenities or other legitimate uses of the sea and therefore justify a limitation on the quality and quantity of the discharge into the marine environment.

Alternate names for this chemical
Hydrogen Nitrate
Aqua Fortis
Nitric Acid
Acide Nitrique

Physico-chemical properties Top

Chemical formula HNO3
Molar mass 63.012 [g/mol]
State Liquid at 25°C and 1 atm
Fusion temperature -41.6 [°C]
Boiling temperature 83 [°C]
1512.9 [Kg/m³] at a temperature of 20°C
10000000 [mg/l] at a temperature of 20°C and salinity of 0‰
Vaporization enthalpy
620517 [J/Kg] at a temperature of 25°C
Specific heat capacity 1744 [J/(Kg·K)]

Behaviour Top

Log Kow 0.21
Log Koc 1.21
Standard European Behaviour Classification (SEBC) Dissolves (D)

Ecotoxicity Top

Lowest median lethal concentration (LC50) on crustacean 180 [mg/l]

Hazards Top



Hazards statements
May intensify fire, oxidiser.
May be corrosive to metals.
Causes severe skin burns and eye damage.

Precautionary statements
Keep away from heat/sparks/open flames/hot surfaces. No smoking.
Keep/Store away from clothing/.../combustible materials.
Take any precaution to avoid mixing with combustibles...
Keep only in original container.
Do not breathe dust/fume/gas/mist/vapours/spray.
Wash ... thoroughly after handling.
Wear protective gloves/protective clothing/eye protection/face protection.
Immediately call a POISON CENTER or doctor/physician.
Wash contaminated clothing before reuse.
Absorb spillage to prevent material damage.
P303 + P361 + P353
IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower.
P304 + P340
IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P305 + P351 + P338
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Store in a closed container.
Store in corrosive resistant/... container with a resistant inner liner.
Dispose of contents/container to ...


GESAMP Hazard profile
A1 A2 B1 B2 C1 C2 C3 D1 D2 D3 E1 E2 E3
0 NI 2 NI 3 1 3 3C 3 NI D 3

A1: Bioaccumulation
Rating Description
0 No potential to bioaccumulate
Rating Description
Rating Description
NI No Information
A2: Biodegradation
Rating Description
NI No Information
B1: Acute aquatic toxicity
Rating Description Criteria [mg/l]
2 Slightly toxic 10 < LC/EC/IC50 ≤ 100
B2: Chronic aquatic toxicity
Rating Description
NI No Information
C1: Acute oral toxicity
Rating Description Criteria [mg/Kg]
3 Moderately high 5 < AOTE ≤ 50
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
3C Corrosive Full-thickness skin ne Corrosive Category 1A
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



  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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EU flagHNS-MS has been funded by DG-ECHO under agreement ECHO/SUB/2014/693705 and runs from 1 January 2015 to 31 March 2017.