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REACH

Reaction Mass of hydrogen bis[4-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzene-1-sulphonato(3-)]ferrate(3-) and trisodium bis[4-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzene-1-sulphonato(3-)]ferrate(3-)

EC number: 943-520-1 | CAS number: -

Life Cycle description
Uses advised against

Physical & Chemical properties

Partition coefficient

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference

Endpoint:

partition coefficient

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Qualifier:

according to guideline

Guideline:

OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)

Deviations:

GLP compliance:

Type of method:

flask method

Partition coefficient type:

octanol-water

Analytical method:

photometric method

Type:

Pow

Partition coefficient:

ca. 0.015

Temp.:

20 °C

pH:

ca. 6.4

Type:

log Pow

Partition coefficient:

ca. -1.838

Temp.:

20 °C

pH:

ca. 6.4

At 96 hours values reached equilibrium, and so this value was considered for final calculations making duplicate determinations of every ratio o/w.

Concentration of mother solution: W1 = 0.0401 g/100ml = 0.4010 g/l

ratio o/w	water phase	n-octanol phase	P_ow	log P_ow	average log P_ow
ratio o/w	c (g/l)	c (g/l)	P_ow	log P_ow	average log P_ow
70 / 30	0.3978	0.0074	0.0185	-1.732011	-1.8206
70 / 30	0.3989	0.0049	0.0123	-1.909250	-1.8206
50 / 50	0.3950	0.0060	0.0151	-1.820704	-1.7637
50 / 50	0.3933	0.0077	0.0196	-1.706795	-1.7637
30 / 70	0.3908	0.0044	0.0112	-1.952074	-1.9301
30 / 70	0.3898	0.0048	0.0124	-1.908150	-1.9301
pH of the test solution:		6.4
Average P_ow		0.0149	Average log P_ow		-1.8382
Std. dev. P_ow		0.0029	Std. dev. log P_ow		0.085

Conclusions:

log Pow = -1.8382 at 20°C and pH 6.40

Executive summary:

Method

OECD guideline 107.

Result

At 20°C and at pH of 6.40:

Pow: 0.0149

log Pow: -1.8382

Description of key information

log Pow = -1.8382 at 20°C and pH 6.40

Key value for chemical safety assessment

Log Kow (Log Pow):: -1.838
at the temperature of:: 20 °C

Additional information

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