Pentasodium 2-[[8-[[4-chloro-6-[[3-[[2-(sulphonatooxy)ethyl]sulphonyl]phenyl]amino]-1,3,5-triazin-2-yl]amino]-1-hydroxy-3,6-disulphonato-2-naphthyl]azo]naphthalene-1,5-disulphonate

Appearance / physical state / colour

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

appearance / physical state / colour

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

From the 24th of June to the 3th of July, 2013

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: OECD 102

Qualifier:

according to guideline

Guideline:

other: OECD 103

Principles of method if other than guideline:

SOP-STR 028:Differential scanning calorimetry or DSC is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature. Both the sample and reference are maintained at nearly the same temperature throughout the experiment. Generally, the temperature program for a DSC analysis is designed such that the sample holder temperature increases linearly as a function of time. Differential scanning calorimetry can be used to measure a number of characteristic properties of a sample. Using this technique it is possible to observe fusion and crystallization events as well as glass transition temperatures Tg. DSC can also be used to study oxidation, decomposition as well as other chemical reactions.

GLP compliance:

no

Physical state at 20°C and 1013 hPa:

solid

Substance type:

organic

Conclusions:

The substance is a solid at room temperature.

Executive summary:

Method

Differential scanning calorimetry or DSC is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature. Both the sample and reference are maintained at nearly the same temperature throughout the experiment. It can be used to measure a number of characteristic properties of a sample, in fact using this technique it is possible to observe fusion and crystallization events as well as glass transition temperatures Tg. DSC can also be used to study oxidation, decomposition as well as other chemical reactions.

DSC was performed on the sample with SOP-STR 028 method to define melting and boiling points of the substance.

Conclusion

Based on outcomes, it can be stated that substance is solid at room temperature.

Reference 2

Endpoint:

appearance / physical state / colour

Type of information:

other: Qualitative Assessment

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: All the conclusions are based on the visual evaluation and on the experience in dealing with the substance

Principles of method if other than guideline:

Qulitative Assessment

GLP compliance:

no

Physical state at 20°C and 1013 hPa:

solid

Form:

solid: particulate/powder

Colour:

Red

Substance type:

organic

Conclusions:

The substance is an odourless red powder at 20 °C and and 101325 Pa.

Executive summary:

Based on handling and visual observation (qualitative assessment) the test substance is an odourless red powder at 20 °C and and 101325 Pa.

Description of key information

The substance is an odourless red powder at 20 °C and and 101325 Pa.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:

solid

Additional information

Based on handling and visual observation (qualitative assessment) the test substance can be described as an odourless dark red powder. Furthermore based on outcomes deriving from the Differential Scanning Calorimetry (DSC) performed to define melting and boiling points, it can be confirmed that substance is solid at room temperature.