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EC number: 200-272-2 | CAS number: 56-40-6
- 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
-primary skin irritation study in rabbits was conducted with the read-across substance beta-alanine (4 hour-exposure, according to OECD 404, Draize scheme; GLP): not irritating to the skin
-eye irritation study was conducted with the read-across substance beta-alanine (equivalent to OECD 405; GLP, Draize score): not irritating to the eyes
Key value for chemical safety assessment
Skin irritation / corrosion
Link to relevant study records
- Endpoint:
- skin irritation: in vivo
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Justification for type of information:
- refer to analogue justification provided in IUCLID section 13
- Reason / purpose for cross-reference:
- read-across source
- Irritation parameter:
- erythema score
- Basis:
- animal #1
- Time point:
- other: mean over 24, 48 and 72 hours
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: reversibility: not applicable
- Irritation parameter:
- erythema score
- Basis:
- animal #2
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: reversibility: not applicable
- Irritation parameter:
- edema score
- Basis:
- animal #1
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: reversibility: not applicable
- Irritation parameter:
- edema score
- Basis:
- animal #2
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: reversibility: not applicable
- Irritant / corrosive response data:
- No evidence of skin irritation was noted during the study.
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Glycine is considered to be not irritating to skin as the source and target substance are considered to have similar skin irritating potential.
Reference
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Eye irritation
Link to relevant study records
- Endpoint:
- eye irritation: in vivo
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Justification for type of information:
- refer to analogue justification provided in IUCLID section 13
- Reason / purpose for cross-reference:
- read-across source
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #1
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: reversibility: not applicable
- Irritation parameter:
- cornea opacity score
- Basis:
- animal #2
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- other: reversibility: not applicable
- Irritation parameter:
- iris score
- Basis:
- animal #1
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0
- Max. score:
- 2
- Reversibility:
- other: reversibility: not applicable
- Irritation parameter:
- iris score
- Basis:
- animal #2
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0
- Max. score:
- 2
- Reversibility:
- other: reversibility: not applicable
- Irritation parameter:
- conjunctivae score
- Remarks:
- redness
- Basis:
- animal #1
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0.33
- Max. score:
- 3
- Reversibility:
- fully reversible within: 48 hours
- Remarks on result:
- other: conjunctival redness was observed at 1 hour observation
- Irritation parameter:
- conjunctivae score
- Remarks:
- redness
- Basis:
- animal #2
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0.33
- Max. score:
- 3
- Reversibility:
- fully reversible within: 48 hours
- Remarks on result:
- other: conjunctival redness was observed at 1 hour observation
- Irritation parameter:
- chemosis score
- Basis:
- animal #1
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0.33
- Max. score:
- 4
- Reversibility:
- fully reversible within: 48 hours
- Remarks on result:
- other: conjunctival redness was observed at 1 hour observation
- Irritation parameter:
- chemosis score
- Basis:
- animal #2
- Time point:
- other: 24, 48 and 72 hours
- Score:
- 0
- Max. score:
- 4
- Reversibility:
- fully reversible within: 48 hours
- Remarks on result:
- other: conjunctival redness was observed at 1 hour observation
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- Glycine is considered to be not irritating to eye as the source and target substance are considered to have similar eye irritating potential.
Reference
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Respiratory irritation
Endpoint conclusion
- Endpoint conclusion:
- no study available
Additional information
For glycine, no data on skin and eye irritation potential is available. Therefore, data on skin and eye irritation of the read-across substance beta-alanine was considered for hazard assessment of these endpoints. The read-across was justified based on inclusion and exclusion rules, a concept developed at or in cooperation with the German Bundesinstitut für Risikobewertung (BfR). Inclusion rules are based on structural alerts and exclusion rules are based on physico-chemical parameters. Inclusion rules are met neither for skin nor for eye irritation/corrosion for both, beta-alanine and glycine. Physico-chemical parameters of both substances are similar and due to the melting point, log Pow and lipid solubiliy, glycine is less likely to be a skin irritant than beta-alanine. Furthermore, dermal absorption coefficients of glycine and beta-alanine are similar and very low for both substances. For details on read across approach see rationale and justification.
A GLP study was performed to assess the irritation potential of beta-alanine to the skin of 2 New Zealand White rabbits. The method was designed to meet the following requirements: OECD Guidelines for the Testing of Chemicals No. 404 “Acute Dermal Irritation/Corrosion” (adopted 24 April 2002); Method B4 Acute Toxicity (Skin Irritation) of Commission Regulation (EC) No. 440/2008. A single 4-hour semi-occluded application of the test material to the intact skin of two rabbits produced no evidence of skin irritation. No corrosive effects were noted. The test material produced erythema score and oedema scores of 0.0 and was classified as non-irritant to rabbit skin according to the Draize classification scheme.
In order to assess the irritation potential of the test material an in vivo eye irritation test was performed on 2 New Zealand White rabbits. The study method was designed to meet the requirements of the following: OECD Guidelines for the Testing of Chemicals No. 405 “Acute Eye Irritation/Corrosion” (adopted 24 April 2002); Method B5 Acute Toxicity (Eye Irritation) of Commission Regulation (EC) No. 440/2008. A volume of 0.1 mL of the test material was placed into the conjunctival sac of the right eye, formed by gently pulling the lower lid away from the eyeball. The application of the test material to the non-irrigated eye of two rabbits produced moderate conjunctival redness (Draize Score 1 for 1 animal and 2 for the second animal), which was reversible with 48 hours.
Justification for selection of skin irritation / corrosion endpoint:
Hazard assessment is conducted by means of read-across from a structural analogue. The selected study is the most adequate and reliable study based on the identified similarities in structure and intrinsic properties between source and target substance and overall quality assessment (refer to the endpoint discussion for further details).
Justification for selection of eye irritation endpoint:
Hazard assessment is conducted by means of read-across from a structural analogue. The selected study is the most adequate and reliable study based on the identified similarities in structure and intrinsic properties between source and target substance and overall quality assessment (refer to the endpoint discussion for further details).
Justification for classification or non-classification
The available data on skin and eye irritation do not meet the criteria for classification according to Regulation (EC) 1272/2008 or Directive 67/548/EEC, and are therefore conclusive but not sufficient for classification.
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.
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