Molekula
Naphthol Green B
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Naphthol Green B is a synthetic organic pigment used in dyeing, printing, and laboratory applications requiring stable green coloration. It is a nitroso dye, the sodium salt of an iron(III) complex of 5-(oxidoimino)-6-oxo-5,6-dihydronaphthalene-2-sulfonate (a nitroso-naphthol sulfonate), and contains no azo group. Available with CAS number 19381-50-1, molecular formula C30H15FeN3Na3O15S3, and molecular weight 878.46 g/mol. Stored at ambient temperature. No signal word required. Molekula supplies Naphthol Green B from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 g — $53.10 per pack
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Dark green powder |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| SKU | 90028312 |
| CAS Number | 19381-50-1 |
| IUPAC Name | trisodium;iron(3+);tris(5-nitroso-6-oxidonaphthalene-2-sulfonate) |
| EC Number | 243-010-2 |
| Molecular Formula | C30H15FeN3Na3O15S3 |
| Molecular Weight | 878.46 |
| Exact Mass | 877.8708 |
| SMILES | C1=CC2=C(C=CC(=C2N=O)[O-])C=C1S(=O)(=O)[O-].C1=CC2=C(C=CC(=C2N=O)[O-])C=C1S(=O)(=O)[O-].C1=CC2=C(C=CC(=C2N=O)[O-])C=C1S(=O)(=O)[O-].[Na+].[Na+].[Na+].[Fe+3] |
| InChIKey | JMXROTHPANUTOJ-UHFFFAOYSA-H |
| InChI | InChI=1S/3C10H7NO5S.Fe.3Na/c3*12-9-4-1-6-5-7(17(14,15)16)2-3-8(6)10(9)11-13;;;;/h3*1-5,12H,(H,14,15,16);;;;/q;;;+3;3*+1/p-6 |
| PubChem CID | 6915910 |
| REACH Code | Y113 |
| TSCA Listed | Yes |
| HTS Code | 32129000 |
| Tariff Code | 3212900000 |
Safety & GHS
Precautionary statements
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Acid green 1
- C.I. 10020
- C.I. Acid Green 1
- C30H15FeN3Na3O15S3
- D and C Green 1
- Ext D and C Green No. 1
- Ext D&C Green 1
- GREEN NO. 401
- Naphthol Green
- VERT B W 7002
Frequently asked questions
What is Naphthol Green B primarily used for?
Naphthol Green B is commonly used as a dye in biological staining, particularly as a histological dye for staining collagen and animal tissue, and as a pH indicator in certain analytical applications.
What is the chemical formula and molecular weight of Naphthol Green B?
The chemical formula is C₃₀H₁₅FeN₃Na₃O₁₅S₃, and the molecular weight is 878.46 g/mol.
How should Naphthol Green B be stored?
Store Naphthol Green B at ambient temperature in a dry, well-ventilated area, away from incompatible substances.
What grade or purity is available for Naphthol Green B?
Molekula supplies Naphthol Green B in analytical and reagent-grade purity, suitable for research and industrial applications.
Can Molekula supply Naphthol Green B in bulk quantities?
Yes, we offer Naphthol Green B in bulk, with flexible packaging options to meet your specific volume requirements.
What documentation comes with an order of Naphthol Green B?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.