UN Number: 1789 - CAS Number: 7647-01-0

Also known as: ACIDE CHLORHYDRIQUE en solution, CHLOROHYDRIC ACID, Hydrochloric Acid Solutions (20%), Solutions D'Acide Chlorhydrique (20%)
Information on chemical

Information on chemical

External resources

CAMEO Chemical Database
WISER Substance List


UN number 1789
CAS number 7647-01-0
Formula HCl

Physical chemical data

Physical State (20°C) Liquid
Physical State (25°C) Liquid
Density (kg/m3)
1190 [Kg/m³] at a temperature of 20°C
1098 [Kg/m³] at a temperature of 25°C
Kinematic viscosity (cSt)
1.2386 [cSt] at a temperature of 20°C
Molar mass (g/mol) 36.5
Density of gas (kg/m3) 1.677
Solubility (g/L)
10000000 [g/L] at a temperature of 20°C and salinity of 0‰
Boiling Point (°C) 50
Melting Point (°C) -114
Vapour Pressure (Pa)
28000 [Pa] at a temperature of 20°C

Behaviour at sea

Additional data

Colour colourless
Odour sharp, irritating odour
MARPOL pollution category
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.
Standard behavior classification DE

Transportation data

Transport mode Bulk,Packaged
Package group II
State liquid
Temperature (°C) ambient
Pressure (Pa) ambient
Family name non oxid. min. acids

Reactivity data

Water No
Abilities Solution.
Acid(s) Yes
Base(s) Yes
Metal(s) and alloys Yes
Oxidizing agents Yes
Reducing agents No
Combustibles No
Organic substance Yes

GESAMP Hazard profile

Bioaccumulation in BCF (A1B) 0 - No measurable BCF
Bioaccumulation (A1) 0 - No potential to bioaccumulate
Acute aquatic toxicity (B1) (LC/EC/IC50 (mg/l)) 1 - Practically non-toxic
Acute mammalian toxicity by swallowing (C1) (LD50 (mg/kg)) 1 - Slight
Acute mammalian toxicity by skin penetration (C2) (LD50 (mg/kg)) 1 - Slight
Acute mammalian toxicity by inhalation (C3) (LC50 (mg/l)) 3 - Moderately high
Skin irritation/corrosivity (D1) 1 - Mildly irritating
Eye irritation/corrosivity (D2) 3 - Severely irritating, with irreversible corneal injury
Interference with coastal amenities (E2) DE - Dissolver/Evaporator
Effects on wildlife and bottom habitats (E3) 3 - Is highly acutely toxic; and/or is severely irritant or corrosive to skin or eyes; and/or is carcinogenic, mutagenic or reprotoxic; and/or is a floater or persistent floater with associated health effects

Human toxicity threshold

Compressed Gas Corrosive Toxic
IDHL 100
Hazard statements
H314 Causes severe skin burns and eye damage.
H331 Toxic if inhaled.
Precautionary statements
P101 If medical advice is needed, have product container or label at hand.
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P314 Get medical advice/attention if you feel unwell.
P403 + P233 Store in a well-ventilated place. Keep container tightly closed.
P405 Store locked up.
ERPG-2 (ppm) 20
ERPG-3 (ppm) 150
10 min 30 min 60 min 4 hrs 8 hrs
AEGL-1 (ppm) 1.8 1.8 1.8 1.8 1.8
AEGL-2 (ppm) 100 43 22 11 11
AEGL-3 (ppm) 620 210 100 26 26


Incident reports

Incident reports

Year Vessel Location Cargo type
2000 Julie.A Harbour of Århus, Denmark Bulk
2000 Martina Öresund, West of Kullen, Sweden Bulk
Emergency Response Guidebook

Emergency Response Guidebook

Guide number: 157

See the guide or download the emergency response guidebook

At sea emergency guide

At sea emergency guide

Emergency schedule: 8-03


Emergency procedures


Turn ship off-wind.

Spillage on deck

Use of water on substance may cause violent reaction. Wash overboard with copious quantities of water from as far away as practicable.

Spillage under deck

Not applicable.

Fire on deck

If possible remove receptacles likely to be involved or keep them cool with water.

Fire under deck

Not applicable.

Special equipment to be carried

Protective clothing (gloves, boots, coveralls, headgear).
Self-contained breathing apparatus.
Spray nozzles.

Remarks by UN no.

Very violent reaction with water; avoid water, if possible use soda ash to neutralize spillage.

Decision trees

Decision trees

No decision trees available

No additional data

last modified 2023-01-16T09:47:56+00:00

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