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Environmental fate & pathways

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Calcium lactate fully dissociates into Ca2+ ions and lactate in aqueous environments. The transport and distribution behaviour of calcium lactate in the environment can be understood in terms of the transport and distribution behaviour of calcium ions and lactic acid (for further information the reader is referred to the read across statement attached in section 13 of the current IUCLID5 file).

Calcium lactate does not contain any functional groups that are susceptible to hydrolysis.

Based on unequivocally positive QSAR predictions (BIOWIN v4.10) and a supporting study investigating the biochemical oxygen demand (BOD) lactic acid is considered to be readily biodegradable, and therefore calcium lactate is considered to be readily biodegradable.

Calcium ions are essential constituents of the body of all animals and the concentration is maintained in the vertebrate body by fractional excretion. Lactic acid is highly soluble in water, has a low log Kow (-0.72) and is readily biodegradable. Both calcium and lactic acid will not bioaccumulate, therefore calcium lactate is not expected to bioaccumulate or bioconcentrate.

Calcium ions may form stable inorganic or organic salts with other counter ions leading to different fates in soil and water compartments in the environment depending on the ion composition. Calcium is naturally present in the environment (water, soil). Due to its physicochemical properties, lactic acid will be present, remain, or distribute to, aqueous compartments, and will be rapidly degraded or metabolized there.

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