Support multiple instances of physical properties

[kderhan]

Is it planned to store physical properties multiple times, so that, for example, different states of aggregation can be saved depending on the temperature?

Thx

[dirk-qualisys]

Discussed in today's workgroup meeting: Different physical states should be covered in different safety data sheets, because a product must be described in its delivery state. But for various other properties, it makes sense to allow multiple values depending on temperature and pressure. The We will consult the phrase workgroup and its experts and double-check where multiple instances should be possible.

[dirk-qualisys]

Brainstorming in today's phrase meeting: a change in physical state would cause other changes, like EUH211/212 or even GHS classification, transport classification, risk management measures. This would require a separate SDS to be consistent. There are borderline cases e.g. with a melting point of 25°C, but in such a case the supplier needs to decide based on temperature (penetrometer test according to ADR/RID). So, multiple entries of the physical state should not be supported.

For physical properties, it might make sense to submit information for other conditions (temperatures and/or pressures) than the delivery state. So multiple instances make sense whereever we have temperature and pressure conditions are relevant.

[dirk-qualisys]

Feedback from an eSDScom chemical expert: The following endpoints are not temperature-dependent and not pressure dependent, so need only a single instance (while all others should allow for multiple instances):

• Appearance
• Odour
• Odour threshold
• Flammability
• Lower and upper explosion limit
• Flash point
• Auto-ignition temperature
• Decomposition temperature
• Particle characteristics
• Mechanical sensitivity
• Self-accelerating polymerization temperature (SAPT)
• Formation of explosible dust/air mixtures
• Acid/alkaline reserve
• Conductivity
• Corrosiveness
• Properties of explosive atmospheres (gases/vapours)
• Redox potential
• Radical formation potential
• Photocatalytic properties
• Solvent content
• Water content
• Solid content
• Propellant content
• Acid number
• Gel permeation chromatography (GPC)
• Solvent separation test

[dirk-qualisys]

• Particle characteristics = ParticleSize
• Mechanical sensitivity = n/a
• Self-accelerating polymerization temperature (SAPT) = n/a
• Formation of explosible dust/air mixtures = n/a
• Corrosiveness = n/a ??
• Solvent content = n/a ??
• Water content = n/a ??
• Gel permeation chromatography (GPC) = n/a

This might need another review, also of the data types.