Lacmoid (pH indicator)

About Lacmoid (pH indicator)

Lacmoid (pH indicator) is an indicator carrying the CAS registry number 33869-21-5. Formula C24H16N2O6, molecular weight 428.4 g/mol. Systematically, it is named 7-amino-2,8-bis(2,4-dihydroxyphenyl)phenoxazin-3-one. It is also known as Resorcin Blue.

The material typically appears as an orange to red to dark violet powder to solid. Keep the material at room temperature in a dry place and protect it from moisture. Good laboratory practice and suitable PPE are recommended during handling.

Key uses span titration end-point detection, pH determination, analytical testing and biological staining. Typical end-use sectors are academic and industrial research.

Available in 5 g, 25 g and 1 kg packs, Lacmoid (pH indicator) is dispatched with a Certificate of Analysis (COA) to destinations worldwide. SDS and detailed specification sheets can be requested with your quotation.

Typical applications

Titration end-point detection
pH determination
Analytical testing
Biological staining

Industries

Specifications & identifiers

Chemical identifiers
Product name	Lacmoid (pH indicator)
Catalogue No.	VQ-000380
CAS Number	33869-21-5
IUPAC name	7-amino-2,8-bis(2,4-dihydroxyphenyl)phenoxazin-3-one
Molecular formula	C₂₄H₁₆N₂O₆
Molecular weight	428.4 g/mol
Exact mass	428.1008
HSN code	32049000
InChIKey	ABNVFGQXCGFSFH-UHFFFAOYSA-N
SMILES	C1=CC(=C(C=C1O)O)C2=CC3=C(C=C2N)OC4=CC(=O)C(=CC4=N3)C5=C(C=C(C=C5)O)O
PubChem CID	3940532

Physical properties
Physical form	Powder
Appearance	Orange to red to dark violet powder to solid
LogP (XLogP3)	2.6
H-bond donors / acceptors	5 / 8
TPSA	146 Å²
Storage	Room temperature

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 Lacmoid (pH indicator)?

The CAS Registry Number of Lacmoid (pH indicator) is 33869-21-5. It is also known as Resorcin Blue.

What is the molecular formula and molecular weight of Lacmoid (pH indicator)?

Lacmoid (pH indicator) has the molecular formula C24H16N2O6 and a molecular weight of 428.4 g/mol. Its IUPAC name is 7-amino-2,8-bis(2,4-dihydroxyphenyl)phenoxazin-3-one.

Which grade and pack sizes of Lacmoid (pH indicator) can I order?

We supply Lacmoid (pH indicator), in 5 g, 25 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Lacmoid (pH indicator)?

Yes. Every lot of Lacmoid (pH indicator) 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 Lacmoid (pH indicator) be shipped internationally?

Yes. We export Lacmoid (pH indicator) worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.

How should Lacmoid (pH indicator) be stored?

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