Molekula
Pararosaniline hydrochloride
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
Pararosaniline hydrochloride is a synthetic triarylmethane dye widely used in biological staining, pH indicators, and analytical chemistry for its vibrant red coloration. Beyond the laboratory, it is used to dye textiles such as silk and acrylics, as well as leather and paper, and in inks and as a component of basic fuchsin. It serves as a key reagent in microscopy, particularly in the preparation of histological slides, and functions as a sensitive indicator in titrations. This chemical has a CAS number of 569-61-9, a molecular formula of C19H18N3Cl, and a molecular weight of 323.82 g/mol. It should be stored at ambient conditions and handled with caution, as it carries a signal word of "Danger." Molekula supplies Pararosaniline hydrochloride 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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5 g — £33.00 per pack ex VAT · £39.60 inc. VAT
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25 g — £47.00 per pack ex VAT · £56.40 inc. VAT
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 crystalline powder |
| Loss on Drying | <10% |
| Solubility | at 0.1% (1:1 IMS:DI water): Red solution |
| Specific absorption | (E1% in 1cm cell at λ max): min 2470 |
| Wavelength of maximum absorption (in 50:50 IMS:Water) | 545 - 548 nm (E1% in 1cm cell) |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless to red crystals |
| Melting Point | 268-270 °C (decomposes) |
| Solubility (other solvents) | Soluble in water (2-3 mg/ml), ethanol (2-25 mg/ml) ethylene glycol methyl ether (50-70 mg/ml) and methanol |
| log P (octanol/water) | -0.21 |
Source: PubChem CID 11292 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 15345357 |
| CAS Number | 569-61-9 |
| IUPAC Name | 4-[(4-aminophenyl)-(4-iminocyclohexa-2,5-dien-1-ylidene)methyl]aniline;hydrochloride |
| EC Number | 209-321-2 |
| Molecular Formula | C19H18ClN3 |
| Molecular Weight | 323.82 |
| Exact Mass | 323.1189 |
| SMILES | C1=CC(=N)C=CC1=C(C2=CC=C(C=C2)N)C3=CC=C(C=C3)N.Cl |
| InChIKey | JUQPZRLQQYSMEQ-UHFFFAOYSA-N |
| InChI | InChI=1S/C19H17N3.ClH/c20-16-7-1-13(2-8-16)19(14-3-9-17(21)10-4-14)15-5-11-18(22)12-6-15;/h1-12,20H,21-22H2;1H |
| PubChem CID | 11292 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 3212.90.0050 |
| Tariff Code | 3212900000 |
Safety & GHS
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Serious Health Hazard
GHS08
Hazard statements
- H340 May cause genetic defects
- H350 May cause cancer
Precautionary statements
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P284 Wear respiratory protection
- P405 Store locked up
- P501 Dispose of contents/container to an approved waste disposal plant
Documents
Safety Data Sheets (SDS)
Available in English, German, Spanish, French, Italian, Portuguese, Arabic, Dutch.
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
- C.I. Basic Red 9 monohydrochloride
- Calcozine magenta N
- CI Basic Red 9
- Fuchsine SP
- Fuchsine SPC
- p-Fuchsin
- Parafuchsin
- Parafuchsine
- Parafuksin
- Pararosaniline chloride
Frequently asked questions
What is pararosaniline hydrochloride commonly used for?
Pararosaniline hydrochloride is primarily used as a dye in biological staining (e.g., for chromatin in microscopy) and as a pH indicator in analytical chemistry.
What is the chemical formula and molecular weight of pararosaniline hydrochloride?
The formula is **C19H18N3Cl**, and the molecular weight is **323.82 g/mol**.
How should pararosaniline hydrochloride be stored?
Store at **ambient temperature** in a tightly sealed container, protected from light and moisture.
What grades of pararosaniline hydrochloride does Molekula supply?
Molekula supplies **analytical and reagent-grade** pararosaniline hydrochloride, suitable for laboratory applications.
Can Molekula supply pararosaniline hydrochloride in bulk quantities?
Yes, we offer bulk packaging options—please contact our sales team for custom quantities and pricing.
What documentation comes with an order of pararosaniline hydrochloride?
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.