Giemsa stain

Name: Giemsa stain
Brand: Vaqora Chemicals
SKU: VQ-000597

About Giemsa stain

Giemsa stain (CAS 51811-82-6) is a biological stain offered by Vaqora Chemicals (Microscopy grade). The compound has the formula C14H14ClN3S, corresponding to a molecular weight of 291.8 g/mol. Its systematic (IUPAC) name is (7-aminophenothiazin-3-ylidene)-dimethylazanium chloride. It is also known as Azure mixture sicc. Giemsa stain or Giemsa's stain.

It is supplied as a dark green powder. Store in a tightly closed container in a cool, dry and well-ventilated place. It carries the GHS signal word “Warning” with 1 hazard statement. Review the Safety Data Sheet before use.

It is commonly used for histology and cytology staining, microscopy and clinical laboratories. Our customers for this product work in academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Standard pack sizes are 25 g, 100 g, 500 g and 1 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories

Industries

Specifications & identifiers

Chemical identifiers
Product name	Giemsa stain
Catalogue No.	VQ-000597
CAS Number	51811-82-6
IUPAC name	(7-aminophenothiazin-3-ylidene)-dimethylazanium chloride
Molecular formula	C₁₄H₁₄ClN₃S
Molecular weight	291.8 g/mol
Exact mass	291.0597
Grade	Microscopy
HSN code	32049000
InChIKey	NALREUIWICQLPS-UHFFFAOYSA-N
SMILES	C[N+](=C1C=CC2=NC3=C(C=C(C=C3)N)SC2=C1)C.[Cl-]
PubChem CID	13735

Physical properties
Physical form	Powder
Appearance	Dark green powder
H-bond donors / acceptors	1 / 4
TPSA	66.7 Å²
Synonyms	Azure mixture sicc. Giemsa stain, Giemsa's stain, Stain, Giemsa, Dimethylthionine, Azure A chloride, 3-Amino-7-(dimethylamino)phenothiazin-5-ium chloride, Azur A, N,N-Dimethylthionine, Phenothiazin-5-ium, 3-amino-7-(dimethylamino)-, chloride, 3-Amino-7-dimethylaminophenothiazin-5-ium chloride, asym-Dimethyl-3,7-diaminophenazathionium chloride, 3-Amino-7-dimethylaminophenazathionium chloride

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H319Causes serious eye irritation

Precautionary statements: P264 + P265, P280, P305 + P351 + P338, P337 + P317

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 51811-82-6

Giemsa stain certified by the Biological Stain Commission

CAS: 51811-82-6
Formula: C₁₄H₁₄ClN₃S
MW: 291.8 g/mol

VQ-000598

Giemsa stain, used as a blood stain

CAS: 51811-82-6
Formula: C₁₄H₁₄ClN₃S
MW: 291.8 g/mol

VQ-000599

Giemsa's staining solution

CAS: 51811-82-6
Formula: C₁₄H₁₄ClN₃S
MW: 291.8 g/mol

VQ-003564

Frequently asked questions

What is the CAS number of Giemsa stain?

The CAS Registry Number of Giemsa stain is 51811-82-6. It is also known as Azure mixture sicc. Giemsa stain, Giemsa's stain, Stain, Giemsa.

What is the molecular formula and molecular weight of Giemsa stain?

Giemsa stain has the molecular formula C14H14ClN3S and a molecular weight of 291.8 g/mol. Its IUPAC name is (7-aminophenothiazin-3-ylidene)-dimethylazanium chloride.

Which grade and pack sizes of Giemsa stain can I order?

We supply Giemsa stain in Microscopy grade, in 25 g, 100 g, 500 g, 1 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Giemsa stain?

Yes. Every lot of Giemsa stain is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Giemsa stain be shipped internationally?

Yes. Giemsa stain is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.