Carmoisine A

Name: Carmoisine A
Brand: Vaqora Chemicals
SKU: VQ-000531

About Carmoisine A

Listed under CAS 3567-69-9, Carmoisine A is a biological stain available from Vaqora Chemicals (Microscopy grade). Its molecular formula is C20H12N2Na2O7S2 and its molecular weight is 502.4 g/mol. The IUPAC name is disodium, 4-hydroxy-3-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate. It is also known as Acid Red 14 or Chromotrope FB.

In its supplied form it is a red to dark red powder. Solubility: soluble in water. Recommended storage is at room temperature in a dry place, with the container kept tightly sealed. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

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

Standard pack sizes are 25 g, 1 kg, 5 x 1 kg and 4 x 25 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Organic synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Carmoisine A
Catalogue No.	VQ-000531
CAS Number	3567-69-9
IUPAC name	disodium;4-hydroxy-3-[(4-sulfonatonaphthalen-1-yl)diazenyl]naphthalene-1-sulfonate
Molecular formula	C₂₀H₁₂N₂Na₂O₇S₂
Molecular weight	502.4 g/mol
Exact mass	501.9881
Grade	Microscopy
HSN code	32041219
InChIKey	YSVBPNGJESBVRM-UHFFFAOYSA-L
SMILES	C1=CC=C2C(=C1)C(=CC=C2S(=O)(=O)[O-])N=NC3=C(C4=CC=CC=C4C(=C3)S(=O)(=O)[O-])O.[Na+].[Na+]
PubChem CID	19118

Physical properties
Physical form	Powder
Appearance	Red to dark red powder
Solubility	Soluble in water
H-bond donors / acceptors	1 / 9
TPSA	176 Å²
Storage	Room temperature
Synonyms	Acid Red 14, Chromotrope FB, Disodium 4-hydroxy-3-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonate, Mordant Blue 79, azorubine, Carmoisine, Azo Rubine, C.I. Acid Red 14, Azorubin, Acid Rubine, C.I. Food Red 3, Karmesin

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P305 + P351 + P338

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 3567-69-9

Microscopy

Azorubin S

CAS: 3567-69-9
Formula: C₂₀H₁₂N₂Na₂O₇S₂
MW: 502.4 g/mol

VQ-000482

Extra Pure

Azorubin S, extra pure 50%

CAS: 3567-69-9
Formula: C₂₀H₁₂N₂Na₂O₇S₂
MW: 502.4 g/mol

VQ-045767

Frequently asked questions

What is the CAS number of Carmoisine A?

The CAS Registry Number of Carmoisine A is 3567-69-9. It is also known as Acid Red 14, Chromotrope FB, Disodium 4-hydroxy-3-[(4-sulfo-1-naphthalenyl)azo]-1-naphthalenesulfonate.

What is the molecular formula and molecular weight of Carmoisine A?

Carmoisine A has the molecular formula C20H12N2Na2O7S2 and a molecular weight of 502.4 g/mol.

Which grade and pack sizes of Carmoisine A can I order?

We supply Carmoisine A in Microscopy grade, in 25 g, 1 kg, 5 x 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 Carmoisine A?

Yes. Every lot of Carmoisine A 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 Carmoisine A be shipped internationally?

Yes. Carmoisine A 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.

How should Carmoisine A be stored?

Room temperature. Keep the container tightly closed and refer to the SDS for full handling guidance.