Registration Dossier
Registration Dossier
Data platform availability banner - registered substances factsheets
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Diss Factsheets
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 231-595-7 | CAS number: 7647-01-0
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
Endpoint summary
Administrative data
Description of key information
Additional information
Environmental fate (hydrogen chloride and hydrochloric acid):
Hydrogen chloride gas for the production of hydrochloric acid (the only non-intermediate use of the gas covered by this dossier), even if not an intermediate in the sense of REACH, is nevertheless produced, transported and used in a completely closed system under strictly controlled conditions (see exposure scenario ES1 and ES2). HCl gas will either react away with hydroxyl radicals or will , in contact with moisture in air, soil or biological media , immediately dissociate to form hydrochloric acid (ref x[1]). Accidently escaped gas will thus mostly precipitate as diluted hydrochloric acid to water or soil. Therefore, the environmental fate of accidently escaped HCl gas is basically identical to the fate of hydrochloric acid in water or soil.
Production methods and/or Conditions for safe use and/or Exposure scenarios
Hydrogen chloride gas for the production of hydrochloric acid (the only non-intermediate use of the gas covered by this dossier), even if not an intermediate in the sense of REACH, is nevertheless produced, transported and used in an integrated, completely closed system under strictly controlled conditions.
Therefore, in the absence of exposure and/or environmental emission potential (other than accidental) no separate risk assessment is deemed necessary for this use up to and including the point where the gas is absorbed in water to form hydrochloric acid. (See exposure scenarios for production of HCl and Production of hydrochloric acid).
[1] Ref x: [Organisation for Economic Cooperation and Development (OECD); Screening Information Data Set (SIDS) for Hydrogen Chloride, CAS # 7647-01-0, p. 4-5 (2002). http://www.inchem.org/documents/sids/sids/7647010.pdf **PEER REVIEWED**
Environmental fate and pathways
According to the OECD SIDS 2002 Hydrogen chloride SIAR:
Hydrogen chloride is readily dissociated in water into hydrated protons and chloride ion.
The physico-chemical properties indicate that hydrogen chloride released into the environment is distributed into the air and water.
Hydrogen chloride can react with hydroxyl radicals to form chloride free radicals and water and its half-life time is calculated as 11 days. No accumulation of hydrogen chloride per se in living organisms is expected due to its high solubility and dissociation properties.
The hazard of hydrochloric acid for the environment is caused by the proton (pH effect). For this reason the effect of hydrochloric acid on the organisms depends on the buffer capacity of the aquatic ecosystem. Also the variation in acute toxicity for aquatic organisms can be explained for a significant extent by the variation in buffer capacity of the test medium.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.