Zinc acrylate

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

GLP compliance:

yes

Type of method:

flask method

Key result

Water solubility:

28.8 g/L

Conc. based on:

test mat.

Loading of aqueous phase:

25 g/L

Incubation duration:

24 h

Temp.:

20 °C

Remarks on result:

other: results day 1

Details on results:

At 24 hours after mixing, the amount of acrylic acid in the water reatched the theoretical maximum based on the amount added. This was confirmed at 48 horus. There was evidence of chemical Instability of zinc diacrylate in water during the test. It dissociated rapidly and completely into acrylic acid and an insoluble zinc compound. The white precipitate was added to water and the water was analyzed for acrylic acid, but contained none. It is likely that the white precipitate is Zinc hydroxide.
Zinc diacrylate completely dissociates in water. As acrylic acid is similarly completely miscible with water at 20 ± 0.5°C with a solubility of 25 g/L, Zinc dlacrylate ls considered similarly miscible in water. The Insoluble white precipitate ls likely Zinc hydroxide.

Test solution	Day 1 (mg/mL)	Day 2 (mg/mL)
1	29.14	30.10
2	28.31	31.06
3	29.09
average	28.8 ()0.5 RSD	30.58 (3.14 relative precent difference)

Conclusions:

Under the study conditions, zinc diacrylate completely dissociates in water. As acrylic acid is similarly completely miscible with water at 20 ± 0.5°C with a solubility of 25 g/L, zinc dlacrylate is considered similarly miscible in water. The Insoluble white precipitate that was observed during the test is likely zinc hydroxide. The solubility of the zinc diacrylate was established to be greater than 28.8 g/L.

Executive summary:

A study was conducted to determine the water solubility of the test substance according to OECD Guideline 105. The results of the preliminary study indicated a water solubility in the gram/liter range. Based on the results of the preliminary test, 25 grams of the zinc diacrylate/liter of water was tested in the main study. The flask method was used for the determination of solubility. Three five-gram samples were weighed into flasks containing 200 ml of water. Analytical verification was performed by GC/MS. At 24 hours after mixing, the amount of acrylic acid in the water reached the theoretical maximum based on the amount added. This was confirmed at 48 horus. There was evidence of chemical Instability of zinc diacrylate in water during the test. It dissociated rapidly and completely into acrylic acid and an insoluble zinc compound. The white precipitate was added to water and the water was analyzed for acrylic acid, but contained none. It is likely that the white precipitate is zinc hydroxide. Under the study conditions, zinc diacrylate completely dissociates in water. As acrylic acid is similarly completely miscible with water at 20 ± 0.5°C with a solubility of 25 g/L, zinc dlacrylate is considered similarly miscible in water. The Insoluble white precipitate that was observed during the test is likely zinc hydroxide. The solubility of the zinc diacrylate was established to be greater than 28.8 g/L (Holyoke, 2003).

Description of key information

Determination of the water solubility according to OECD Guideline 105 (Holyoke, 2003).

Key value for chemical safety assessment

Water solubility:

28.8 g/L

at the temperature of:

20 °C