GIEMSA, stain, solution, 500 ml, bot.


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CE marking: declaration that the product meets EU standards for health, safety, and environmental protection. The CE marking indicates that the product may be sold freely in any part of the European Economic Area, regardless of its country of origin.
W0103010302 - Romanowsky stains
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Thermosensitive codes are defined for storage and transportation temperature requirements of the products.
OC subscriptions: included in supply or field order tools (e.g. UniField)
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OC validations: approved for procurement and use by an OC for international or local orders specifying context and activity in Medical Standard Lists (MSL)

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GIEMSA, stain, solution (Merck)


Ready to use solution intended for staining blood smears and blood samples.


Methylene blue azure eosine dye, Giemsa's azur eosin methylene blue solution


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Technical specifications

  • Solution
  • Composition: giemsa, glycerol, methanol

Packaging & Labelling

Botlle of 500 ml or 1 l

Transport Dangerous Goods

  • UN1230
  • Class: 3 (6.1)
  • Packing group: II
  • Proper shipping name: Methanol solution

Instructions for use

For acting, the Giemsa should always be used diluted. Depending on the dilution, the staining will be rapid or slow.


  • Rapid staining: 10% dilution with staining time of 8-10 minutes
  • Slow staining : 3% dilution with staining time of 45-60 minutes

These times vary according to the quality of the Giemsa and you need to make some tests to find out the best protocol.

To guarantee the staining quality, the dilution should be performed extemporaneously with buffered water at pH 7.2.

Please consult the “Updated laboratory procedures, 2022” available online via the Laboratory working Group sharepoint page: Laboratory Procedures and Resources.

For offline access, contact your laboratory advisor.


  • Protected from light and humidity
  • Expiry date indicated on the bottle
  • Store between 15 and 25°C


Parcels with IATA packaging are marked "METHANOL", which can result in errors when storing the goods.

Waste management

Substance with hazardous characteristics. Please contact your watsan referent for advice on proper disposal.

Detailed hazard and precautionary information can be found in the safety data sheet (SDS).

Classification EC Regulation N° 1272/2008

  • Flammable liquids: Category 2, H225
  • Acute toxicity, Oral: Category 3, H301
  • Acute toxicity, Inhalation: Category 3, H331
  • Acute toxicity, Dermal: Category 3, H311
  • Specific target organ toxicity - single exposure: Category1, H370

Signal Word


Image Image Image
H225Highly flammable liquid and vapour
H370Causes damage to organs (or state all organs affected, if known) (state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard).
H301 + H311 + H331Toxic if swallowed, in contact with skin or if inhaled
P403 + P235Store in a well-ventilated place. Keep cool.
P233Keep container tightly closed.
P240Ground/bond container and receiving equipment.
P280Wear protective gloves/protective clothing/eye protection/face protection
P302 + P352IF ON SKIN: wash with plenty of soap and water
P304 + P340IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing.
P309 + P311IF exposed or if you feel unwell: Call a POISON CENTER or doctor/physician.

MSF requirements

The Giemsa is the stain of reference for malaria: with a pH 7.2 buffer solution, it clearly shows the contrast between the parasites and the blood elements.

If you want to use FIELD stain A and B, contact your laboratory advisor.

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