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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 231-442-4 | CAS number: 7553-56-2
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:
- other: see 'Remark'
- Remarks:
- Data from peer reviewed handbooks is considered acceptable and a trusted source. In this reference, data for physical constants have been taken from many sources, including both compilations and the primary literature. Where conflicts were found, the value deemed most reliable was chosen. Although peer-reviewed, the reference does not include information on material and methods.
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Observation at room temperature
- GLP compliance:
- not specified
- Physical state at 20°C and 1013 hPa:
- solid
- Form:
- not specified
- Colour:
- bluish-black, lustrou
- Substance type:
- inorganic
- Conclusions:
- Iodine is a bluish-black, lustrous solid.
- 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:
- other: Handbook data is considered as a trusted source. The reference is a compendium of physical data that are taken to be ‘reliable’.
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Observation at room temperature
- GLP compliance:
- not specified
- Physical state at 20°C and 1013 hPa:
- solid
- Form:
- other: plates or granules
- Colour:
- Grayish-black having a metallic luster
- Odour:
- other: no data
- Substance type:
- inorganic
- Conclusions:
- Heavy, grayish-black plates or granules having a metallic luster; characteristic odor.
- 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:
- other: see 'Remark'
- Remarks:
- Handbook data are considered from a trusted source. The reference contains peer-reviewed physicochemical data. Physical data are cited as found in the literature. When several alternate data values appear in the literature, the data is evaluated and representative selections are made.
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Observation at room temperature
- GLP compliance:
- not specified
- Physical state at 20°C and 1013 hPa:
- solid
- Form:
- other: scales or plates
- Colour:
- Bluish-black
- Odour:
- other: no data
- Substance type:
- inorganic
- Conclusions:
- Bluish-black scales or plates; diatomic; violet vapor
- 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:
- other: Handbook data is considered as a trusted source, however the reference (10th edition) provides no indication that the physico-chemical data has been ‘peer reviewed’.
- Qualifier:
- no guideline required
- Principles of method if other than guideline:
- Observation at room temperature
- GLP compliance:
- not specified
- Physical state at 20°C and 1013 hPa:
- solid
- Form:
- crystalline
- Colour:
- violet-black with metallic luster
- Odour:
- other: not indicated
- Substance type:
- inorganic
- Conclusions:
- Rhombic, violet-black crystals with metallic luster
Referenceopen allclose all
Description of key information
Data available from four handbooks
- Iodine is reported as a bluish-black, lustrous solid (CRC Handbook, 2005; Merck Index, 2001),
- grayish-black solid with metallic luster (Hawley's, 2007 ; Sax's, 1999)
Key value for chemical safety assessment
- Physical state at 20°C and 1013 hPa:
- solid
Additional information
Iodine is reported as a bluish-black , lustrous solid (CRC Handbook, 2005; Merck Index, 2001), or as a grayish-black solid with metallic luster (Hawley's, 2007 ; Sax's, 1999). Substance is marketed in granular form as prills or flakes. Based on all information, iodine can be described as bluish/greyish-black solid prills or flakes with metallic luster.
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.
