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What type of preservative are suitable for milk?

Potassium dichromate

Sodium methylparaben

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Preservatives suitable for milk include bronopol, penicillin, streptomycin, sodium methylparaben, methylparaben, sodium azide, 2-bromo-2-nitropropane-1,3-diol, and natamycin. These preservatives can prolong the safe storing deadline of milk samples, increase the safe storing temperature, and ensure the accuracy of milk sample testing. They have low toxicity, high efficiency, and good antiseptic effects. Potassium dichromate is also commonly used as a milk sample preservative. It is important to note that the use of preservatives allows for the preservation of milk samples without the need for refrigeration and without the health problems associated with conventional preservatives such as dichromates.

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Journal Article•DOI Effect of preservatives on milk composition determination Peter Zajác, S. Zubricka, Jozef Čapla, Lucia Zeleňáková, Radoslav Židek, Jozef Čurlej - Show less +5 more 01 Oct 2016-International Dairy Journal 4 Citations	The paper does not provide information about which type of preservative is suitable for milk. The paper focuses on studying the effect of different concentrations of four preservatives (potassium dichromate, Azidiol, Bronopol, and Microtabs II) on the results of milk composition analysis.
Open access•Journal Article•DOI Milk Sample Preservation Manfred Kroger 01 Mar 1985-Journal of Dairy Science 23 Citations	Potassium dichromate is the most widely used milk sample preservative, while other substances have been investigated but not widely endorsed or used.
Patent Milk sample preservative Garry R. S. Ruttan 19 May 1992 12 Citations	The suitable preservatives for milk mentioned in the paper are 2-bromo-2-nitropropane-1,3-diol and natamycin.
Patent Preservative applicable to measuring DHI milk sample and use method thereof Liu Juxiang, Ma Yabin, Huang Kangdong - Show less +2 more 22 Mar 2017	The preservative suitable for milk mentioned in the paper is a combination of bronopol and sodium azide, with a recommended dosage of 0.2-1g per liter of milk sample.
Patent Preservative for DHI testing milk samples and using method thereof Liu Juxiang, Ma Yabin - Show less +1 more 09 Dec 2015 2 Citations	The paper provides information about a preservative for DHI testing milk samples, which is prepared from bronopol, penicillin, streptomycin, and a first component (sodium methylparaben or methylparaben).

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