Glycerol oral solution 0.644 g/mL Ph. Fr.

Colourless or slightly yellowish liquid. ^[1]

Oral use according to the monograph. No specific clinical indication is inferred from the source’s ATC S03 code. ^[1]

Composition and final quantity follow the formula table (100 g). The reviewed specific text gives no numerical assay, microbial-count or physicochemical acceptance range; no unsupported limit is assigned. ^[1]

Finished-product photostability is not specified. Any required container light protection is stated under Storage. ^[1]

No oxidative stability study of the finished mixture or inert-atmosphere requirement is provided. Use the source container. ^[1]

Glycerol is miscible with water. This does not establish product microbiological stability.
Sodium Chloride: JP classifies the corresponding pure raw material as freely soluble in water. ^{[2], [4]}

Glycerol is hygroscopic; limit raw-material exposure to moisture. ^[2]

No permitted temperature excursion or freeze–thaw cycle is established. Processing and storage temperatures are stated in their respective fields. ^[1]

No finished-product pH range is specified. Do not add a pH adjuster without a supported formula change. ^[1]

Glycerol: hazardous reaction with strong oxidising agents. ^[2]

Glycerol: clear, colourless, viscous and strongly hygroscopic liquid. It mixes with water but is practically insoluble in fixed and essential oils.
Sodium Chloride: raw-material water solubility is classified as freely soluble by JP.
Glycerol: retain original manufacturer, lot and reliable certificate. For the applicable raw materials, FDA describes DEG and EG testing, each limited to 0.10% under the relevant monograph. This is a raw-material limit. ^{[2], [4], [5]}

Clean long-sleeved laboratory clothing, hair covering and gloves during handling; change gloves after contamination or damage.
Contain powder during weighing and trituration and use eye protection; select respiratory protection for the actual exposure. ^{[1], [3], [6]}

Reference batch: 100 g. First ingredient: Glycerol, 56 g. Independently check chemical form, units and every scale conversion before weighing.
Check complete dissolution and crystallisation at the selected temperature. Calculate dose volume from the exact mg/mL, not the starting tablet or stock strength. Supply a suitable oral syringe.
For the local assessment record quantity per preparation, work frequency, duration of open handling, potential exposure routes and effectiveness of controls. These are assessment inputs; no fictitious final risk score is assigned.
Release checkpoint: confirm final volume or mass at the reference temperature, intended clarity or dispersion, and specified container/closure. Do not equate grams and millilitres without a justified density. ^{[1], [9], [11]}

Before mixing: verify each ingredient’s chemical form and lot, record theoretical amounts and check equipment cleanliness. Follow the temperatures and addition sequence in the procedure below. ^{[1], [6]}

Period reported by source: 1 month; temperature and container are not specified in the short text.
This duration is a specific formulary/source instruction. This review did not verify a complete primary study establishing chemical, physical and microbiological extension for the same finished formulation.
Selected general rule: up to 35 days for an aqueous form appropriately preserved in its final composition and pH. Use 20–25 °C, or 2–8 °C only where permitted/required by the source and compatible with the dosage form. A preservative name is insufficient if it is diluted, inactivated or partitioned into another phase.
The reference-policy ceiling in this edition is the shorter of the source period above and the general ceiling. Extension needs matching active/excipients/strength, container, temperature, a stability-indicating method and the required microbiological evidence for aqueous extension. An applicable official USP–NF compounded monograph is assessed separately in its complete text.
Use-by date = the earliest allowed date from preparation plus selected period, ingredient expiries and any shorter supported limit. In-use dating never extends overall BUD. Complete the actual date for the batch after the required checks.
A default is a conservative dating limit, not experimental proof of batch stability. Its category depends on final composition, preservation and permitted temperatures. Water percentage or loss on drying does not determine aw. Document using SOP-014/F-006; use SOP-017/F-012 for specific aw evidence.
USP clarification: aw measurement is not required for every nonsterile preparation. Category assignment may use the exact composition and relevant representative examples; an uncertain or borderline formulation is best assessed by a suitable specific measurement. This edition contains no measured aw or released batch. The final preparation generally must not outlast the remaining BUD of its compounded bases/intermediates. An exception requires specific justification that physical, chemical and microbiological quality is not adversely affected. Record the final limit, intermediate preparation dates and their actual expiry dates separately.
v9 correction: the source specifies 1 calendar month. The edition uses a conservative fixed reference ceiling of 28 days; the general 35-day category cannot extend the shorter source period. No experimental stability evidence is added. ^{[1], [7], [8], [10], [12]}

No separately registered base is required. Any commercial vehicle remains the exact named product in the formula table. ^[1]

Balance with suitable minimum weight, mortar/pestle or homogeniser, mixing vessels, spatulas, thermometer for heated processes and volumetric equipment for mL quantities. ^[1]

Mix water and glycerol, heating up to 62 °C. Dissolve remaining ingredients with stirring and filter. ^[1]

Composition is by mass; title strength is by volume. Document density before volume dosing. ^[1]

The reviewed monograph does not specify storage conditions. Assign temperature from the supported BUD category and selected compatible container. ^[1]

Glycerol: 0.075 g in 45 mL water, oxidise with 25.0 mL 0.1 M H2SO4/0.1 M NaIO4 mixture (1:20), 15 min protected from light. Add 5.0 mL ethylene glycol 500 g/L, wait 20 min protected from light. Titrate with 0.1 M NaOH/phenolphthalein and a blank; 1 mL equals 9.21 mg glycerol.
Polyol incoming QC: pharmacies test each lot or ensure documented testing by a reliable supplier, as described by FDA. IR identity alone does not exclude DEG/EG.
Record the method, acceptance criterion, actual result and reviewer separately in F-005. A critical specification failure requires quarantine and investigation under SOP-015; retesting needs justification. ^{[1], [5], [11]}

The reviewed monograph does not specify storage conditions. Assign temperature from the supported BUD category and selected compatible container. ^[1]

Dispense the exact prescribed strength. For liquids use a suitable graduated oral syringe; record dose and frequency from the prescription. ^[1]

Glycerol oral solution 0.644 g/mL Ph. Fr.
Oral use
Quantity: ____ Batch: ____
Prepared: ____ Use by: ____
Patient / dose / frequency: ____
Storage: The reviewed monograph does not specify storage conditions. Assign temperature from the supported BUD category and selected compatible container.
Temperature for this batch BUD: ____ ^[1]

The numeric value is a literature reference ceiling subject to its specific conditions. No actual batch BUD has been assigned and no aw measurements have been produced. The exact formula, prerequisites, container, storage and quality evidence require approval for the actual application. The BUD clock starts when compounding begins. Use the shortest applicable supported limit and assess in-use dating separately. USP categories are a technical framework and are not presented as Greek legislation.