REFERENCE FORMULA
Reference formula
Reference basis: 1000 mL
| Ingredient | Source quantity | Scaled quantity |
|---|---|---|
| Calamine | 150 g | — |
| Zinc oxide | 50 g | — |
| Bentonite | 30 g | — |
| Sodium citrate BP | 5 g | — |
| Liquefied phenol | 5 mL | — |
| Glycerol | 50 mL | — |
| Freshly boiled and cooled purified water | q.s. ad 1000 mL | — |
REFERENCE FORMULA SCALING
Proportional quantities of the same formula
Arithmetic aid. It does not change strength, dose, method or BUD and does not authorise compounding.
Theoretical calculation sheet
CGR-BP-006 · Calamine Lotion
Not an approved master record or batch release. BUD is not calculated.
| Ingredient | Reference | Calculated | Lot | Actual quantity |
|---|
Prerequisite formulations
No separate prerequisite monograph is listed.
Documentation
Preparation description
Cutaneous suspension: Calamine Lotion. Additional appearance criteria are not established by the specific text reviewed. [1]
Action and use
Specifications
Identification and tests: consult primary text. [1]
Light
Finished-product photostability is not specified. Any required container light protection is stated under Storage. [1]
Air and oxidation
No oxidative stability study of the finished mixture or inert-atmosphere requirement is provided. Use the source container. [1]
Water and solubility
Humidity
Glycerol is hygroscopic; limit raw-material exposure to moisture. [4]
Temperature
No permitted temperature excursion or freeze–thaw cycle is established. Processing and storage temperatures are stated in their respective fields. [1]
pH and compatibility
Other interactions
Glycerol: hazardous reaction with strong oxidising agents. [4]
Ingredient-specific information
Glycerol: clear, colourless, viscous and strongly hygroscopic liquid. It mixes with water but is practically insoluble in fixed and essential oils.
Calamine of the cited specification is basic zinc carbonate containing traces of iron(III) oxide. Sieving and trituration reduce aggregates. Levigate using only the component and sequence prescribed in this monograph’s method; do not add an unlisted polyol or extra liquid.
Zinc oxide: light, white to slightly yellowish, amorphous powder without aggregates. Dilute mineral acids dissolve it; fatty acids in a base can form zinc salts.
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], [3], [4], [7]
Calamine of the cited specification is basic zinc carbonate containing traces of iron(III) oxide. Sieving and trituration reduce aggregates. Levigate using only the component and sequence prescribed in this monograph’s method; do not add an unlisted polyol or extra liquid.
Zinc oxide: light, white to slightly yellowish, amorphous powder without aggregates. Dilute mineral acids dissolve it; fatty acids in a base can form zinc salts.
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], [3], [4], [7]
Staff protection
Phenol: prevent skin/eye contact, select gloves using the SDS and provide prompt eyewash access.
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], [5], [6], [8]
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], [5], [6], [8]
Risk assessment
Phenol: skin absorption, burns and systemic toxicity.
Reference batch: 1000 mL. First ingredient: Calamine, 150 g. Independently check chemical form, units and every scale conversion before weighing.
Check homogeneity, aggregates, separation and actual yield before subdivision. Packaging should allow uniform application without introducing water into the contents.
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: sample representative locations and early/late filling; record settling or separation and redispersibility. Verify delivery of the intended amount; visual uniformity alone does not demonstrate API uniformity. [1], [6], [11], [13]
Reference batch: 1000 mL. First ingredient: Calamine, 150 g. Independently check chemical form, units and every scale conversion before weighing.
Check homogeneity, aggregates, separation and actual yield before subdivision. Packaging should allow uniform application without introducing water into the contents.
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: sample representative locations and early/late filling; record settling or separation and redispersibility. Verify delivery of the intended amount; visual uniformity alone does not demonstrate API uniformity. [1], [6], [11], [13]
Compounding conditions
BUD rationale
No specific experimental period was located covering the complete exact formulation, container and microbiological suitability.
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.
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. [1], [10], [12], [14]
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.
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. [1], [10], [12], [14]
Prerequisites
No separately registered base is required. Any commercial vehicle remains the exact named product in the formula table. [1]
Equipment
Balance with suitable minimum weight, mortar/pestle or homogeniser, mixing vessels, spatulas, thermometer for heated processes and volumetric equipment for mL quantities. [1]
Compounding method
Dissolve sodium citrate in about 700 mL water. Triturate calamine, zinc oxide and bentonite with the solution. Add liquefied phenol and glycerol; make up to 1000 mL. [1]
Observations
Not interchangeable with phenol-free calamine formulations. [1]
Container and packaging
Selection for local assessment: well-closed bottle compatible with the liquid. Check cleanliness, integrity, closure and material compatibility before filling. The specific monograph does not validate a particular commercial container. [1]
Quality control
Ignition residue from 5 g: 14.5–18.0% w/w, successive weighings differing by ≤0.2%. The source also specifies glycerol and zinc identification reactions.
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], [7], [13]
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], [7], [13]
Storage
For a general-rule duration, also apply the temperature of the selected BUD category. The source does not support arbitrary temperature changes. [9]
Dispensing
Dispense with a clear route, strength and use-by date. Complete amount per application and frequency from the prescription. [1]
Labelling
Calamine Lotion
External use
Quantity: ____ Batch: ____
Prepared: ____ Use by: ____
Patient / dose / frequency: ____
Storage:
Shake/redisperse well before use.
Temperature for this batch BUD: ____ [1]
External use
Quantity: ____ Batch: ____
Prepared: ____ Use by: ____
Patient / dose / frequency: ____
Storage:
Shake/redisperse well before use.
Temperature for this batch BUD: ____ [1]
v9_controls
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.
Independent Greek/English adaptation and organisation of facts from the cited source. This is not an official translation or publisher endorsement.
Sources and references
- British Pharmacopoeia 2016 — Calamine Lotion2016PDF pp. 1–1; user-supplied BP extract; URL is publisher catalogue, not the licensed full monographmaster formula2026-09-10
- FN/2003/PA/028 ÓXIDO DE ZINCΔιαθέσιμο κείμενο / Retrieved textPDF pp. 1–2ingredient action2026-09-10
- FN/2003/PA/008 CALAMINAΔιαθέσιμο κείμενο / Retrieved textPDF pp. 1–2ingredient action2026-09-10
- FN/2003/PA/013 GLICEROLΔιαθέσιμο κείμενο / Retrieved textPDF pp. 1–2raw material or occupational2026-09-10
- PN/L/PG/002/00 INDUMENTARIAΔιαθέσιμο κείμενο / Retrieved textPDF pp. 1–5general staff protection2026-09-10
- CDC/NIOSH — Pocket Guide to Chemical Hazards: PhenolRetrieved source editionFull cited procedureingredient facts2026-09-12
- FDA — Testing of Glycerin, Propylene Glycol, Maltitol Solution, Hydrogenated Starch Hydrolysate, Sorbitol Solution, and Other High-Risk Drug Components for Diethylene Glycol and Ethylene GlycolMay 2023, revision 1Recommendations; section on pharmacy compoundingraw material quality2026-09-12
- ASHP — USP <795> Key Changes2023pp. 1–3: scope, water activity and staff precautionsprofessional guidance; not the licensed USP chapter2026-09-12
- Texas State Board of Pharmacy — adopted 22 TAC §291.131, nonsterile compoundingTexas Register, 7 June 2024Beyond-use dating: aw categories, 14/35/90/180 days, limits and extensionspublic regulatory implementation of USP <795> BUD framework; not Greek law2026-09-12
- Illinois IDFPR — Nonsterile Compounding Self-Inspection ReportPublic checklist, retrieved 12 September 2026pp. 15–16, Establishing beyond-use datesPublic regulatory implementation of USP <795>; not Greek law; general limits and requirements for extension2026-09-12
- NIOSH — Managing Hazardous Drug Exposures: Information for Healthcare Settings2023; DHHS (NIOSH) 2023-130Risk assessment; printed pp. 27–33, activity/formulation control tableWorkplace exposure, hierarchy of controls and activity-specific PPE; US government public-domain document2026-09-12
- USP — Compounding Standards and Beyond-Use Dates, 2022 updateNovember 2022, published by USP; public copy hosted by Mississippi Boardpp. 1–2; nonsterile tableRisk-based default categories; not product-specific stability or Greek law2026-09-12
- PIC/S — Guide to Good Practices for the Preparation of Medicinal Products in Healthcare EstablishmentsPE 010-4, 1 March 2014Chapters 1–9; Annex 2 (nonsterile liquids, creams, ointments)Professional quality-system framework; not automatic national legal adoption or certification2026-09-12
- USP — General Chapter <795> FAQsUpdated 1 November 2023Questions 52, 54–56, 60–62; PDF pp. 11–14Primary clarification of aw classification, extension prerequisites and compounded-component BUDs; not automatic Greek legal adoption2026-10-14