Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
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EC number: 231-764-5 | CAS number: 7722-76-1
Appearance / physical state / colour
Administrative data
Link to relevant study record(s)
- Endpoint:
- appearance / physical state / colour
- Type of information:
- other: handbook
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- The following information was generated from the Hazardous Substances Data Bank (HSDB), a database of the National Library of Medicine's TOXNET system (http://toxnet.nlm.nih.gov) on February 2th, 2010. The reference source is indicated although not leading to sufficient information on the material & method used. The reference was a peer-reviewed handbook. Handbook data are considered from a trusted source.
- Qualifier:
- no guideline required
- GLP compliance:
- not specified
- Physical state at 20°C and 1013 hPa:
- solid
- Key result
- Form:
- crystalline
- Colour:
- white
- Odour:
- odourless
- Substance type:
- inorganic
- Conclusions:
- The CRC Handbook of Chemistry and Physics (76th ed.) describes ammonium dihydrogenorthophosphate as white tetrahedral crystals.
- Endpoint:
- appearance / physical state / colour
- Type of information:
- other: handbook
- Adequacy of study:
- weight of evidence
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Remarks:
- Handbook data are considered from a trusted source. Data have been taken from many sources, including both compilations and the primary literature - where conflicts were found, the value deemed most reliable was chosen. The reference was peer-reviewed. In addition, the reference sources are indicated although not leading to sufficient information on the material & method used.
- Qualifier:
- no guideline required
- GLP compliance:
- not specified
- Physical state at 20°C and 1013 hPa:
- solid
- Key result
- Form:
- crystalline
- Colour:
- white
- Odour:
- odourless
- Substance type:
- inorganic
- Conclusions:
- The Merck Index (12th ed.) describes ammonium dihydrogenorthophosphate as odourless crystals or a white crystalline powder.
- Endpoint:
- appearance / physical state / colour
- Type of information:
- other: handbook
- Adequacy of study:
- weight of evidence
- Reliability:
- 4 (not assignable)
- Rationale for reliability incl. deficiencies:
- documentation insufficient for assessment
- Remarks:
- The preface and introduction to this book (9th Edition) provide no indication that the physico-chemical data has been ‘peer reviewed’. The reference source is not indicated leading to insufficient information on the material & method used.
- Qualifier:
- no guideline required
- GLP compliance:
- not specified
- Physical state at 20°C and 1013 hPa:
- solid
- Form:
- powder
- Form:
- other: crystals
- Colour:
- brilliant-white
- Odour:
- other: not mentioned in the handbook
- Substance type:
- inorganic
- Conclusions:
- Sax's Dangerous Properties of Industrial Materials (9th. ed.) describes ammonium dihydrogenorthophosphate as brilliant-white crystals or powder.
Referenceopen allclose all
Description of key information
Combining three handbooks, ammonium dihydrogenorthophosphate could be described as white tetrahydral crystals or white crystalline powder.
Key value for chemical safety assessment
- Physical state at 20°C and 1013 hPa:
- solid
- Form:
- solid: particulate/powder
- Colour:
- white
Additional information
The handbooks used:
-The CRC Handbook of Chemistry and Physics (76th ed.)
-The Merck Index (12th ed.)
-Sax's Dangerous Properties of Industrial Materials (9th. ed.)
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.
