Lactulose Solution
» Lactulose Solution is a solution in water prepared from Lactulose Concentrate. It contains not less than 90.0 percent and not more than 110.0 percent of the labeled amount of lactulose (C12H22O11).
Packaging and storage—
Preserve in tight containers, preferably at a temperature between 2
and 30. Avoid subfreezing temperatures.
and 30. Avoid subfreezing temperatures.
USP Reference standards 
11
—
11—
USP Epilactose RS 
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USP Fructose RS
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USP Galactose RS
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USP Anhydrous Lactose RS
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USP Lactulose RS
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Microbial enumeration tests 61 and Tests for specified microorganisms 62—
The total bacterial count does not exceed 100 cfu per g of lactulose, and the tests for Salmonella species and Escherichia coli are negative.
61 and Tests for specified microorganisms 62—
The total bacterial count does not exceed 100 cfu per g of lactulose, and the tests for Salmonella species and Escherichia coli are negative.
pH 791:
between 2.5 and 6.5, after 15 minutes of contact with the electrodes.
791:
between 2.5 and 6.5, after 15 minutes of contact with the electrodes.
Other requirements—
It meets the requirements for the Identification tests, the Related compounds test, and the Assay under Lactulose Concentrate.
Auxiliary Information—
Please check for your question in the FAQs before contacting USP.
| Topic/Question | Contact | Expert Committee |
|---|---|---|
| Monograph | Elena Gonikberg, Ph.D.
Principal Scientific Liaison 1-301-816-8251 |
(SM32010) Monographs - Small Molecules 3 |
| Reference Standards | RS Technical Services 1-301-816-8129 rstech@usp.org |
|
| 61 |
Radhakrishna S Tirumalai, Ph.D.
Principal Scientific Liaison 1-301-816-8339 |
(GCM2010) General Chapters - Microbiology |
| 62 |
Radhakrishna S Tirumalai, Ph.D.
Principal Scientific Liaison 1-301-816-8339 |
(GCM2010) General Chapters - Microbiology |
USP35–NF30 Page 3631
Pharmacopeial Forum: Volume No. 37(3)