Thionin

Name: Thionin
Brand: Vaqora Chemicals
SKU: VQ-000721

About Thionin

Listed under CAS 78338-22-4, Thionin is a biological stain available from Vaqora Chemicals (Microscopy grade). Formula C14H13N3O2S, molecular weight 287.34 g/mol. Systematically, it is named (7-aminophenothiazin-3-ylidene)azanium acetate. Alternative names: 3,7-Diamino-5-phenothiazinium acetate and Lauth's violet.

It is supplied as a green to dark green powder. Store sealed in a dry, well-ventilated location away from incompatible materials. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

Key uses span histology and cytology staining, microscopy, clinical laboratories and buffer preparation. Buyers come mainly from academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Vaqora Chemicals supplies Thionin in 5 g, 25 g, 100 g and 1 kg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories
Buffer preparation

Industries

Specifications & identifiers

Chemical identifiers
Product name	Thionin
Catalogue No.	VQ-000721
CAS Number	78338-22-4
IUPAC name	(7-aminophenothiazin-3-ylidene)azanium acetate
Molecular formula	C₁₄H₁₃N₃O₂S
Molecular weight	287.34 g/mol
Exact mass	287.0728
Grade	Microscopy
HSN code	32049000
InChIKey	JOIRQYHDJINFGA-UHFFFAOYSA-N
SMILES	CC(=O)[O-].C1=CC2=C(C=C1N)SC3=CC(=[NH2+])C=CC3=N2
PubChem CID	2724414

Physical properties
Physical form	Powder
Appearance	Green to dark green powder
H-bond donors / acceptors	2 / 5
TPSA	129 Å²
Synonyms	3,7-Diamino-5-phenothiazinium acetate, Lauth's violet, Thionin acetate, thionine acetate, Thionin acetate salt, 3,7-diaminophenothiazin-5-ium acetate, Phenothiazin-5-ium, 3,7-diamino-, acetate, 3,7Diamino5phenothiazinium acetate, Thionin acetate (Thionine acetate), Thionin acetate salt Certified, 3,7-diamino-5lambda4-phenothiazin-5-ylium acetate

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, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

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

Frequently asked questions

What is the CAS number of Thionin?

The CAS Registry Number of Thionin is 78338-22-4. It is also known as 3,7-Diamino-5-phenothiazinium acetate, Lauth's violet, Thionin acetate.

What is the molecular formula and molecular weight of Thionin?

Thionin has the molecular formula C14H13N3O2S and a molecular weight of 287.34 g/mol. Its IUPAC name is (7-aminophenothiazin-3-ylidene)azanium acetate.

Which grade and pack sizes of Thionin can I order?

We supply Thionin in Microscopy grade, in 5 g, 25 g, 100 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Thionin?

Yes. Every lot of Thionin 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 Thionin be shipped internationally?

Yes. Thionin 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.