Molekula
Tropaeolin OO
Tropaeolin OO is a sodium salt of a synthetic azo dye used primarily as a pH indicator and in analytical chemistry for detecting certain metal ions. It appears as a red crystalline powder with a molecular formula of C18H14N3O3SNa and a molecular weight of 375.38 g/mol. It is stable at ambient temperatures and should be handled with care due to its warning signal word. Molekula supplies Tropaeolin OO from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Overview
Tropaeolin OO is a sodium salt of a synthetic azo dye used primarily as a pH indicator and in analytical chemistry for detecting certain metal ions. It appears as a red crystalline powder with a molecular formula of C18H14N3O3SNa and a molecular weight of 375.38 g/mol. It is stable at ambient temperatures and should be handled with care due to its warning signal word. Molekula supplies Tropaeolin OO from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Specifications
| Property | Value |
|---|---|
| Appearance | Orange/brown powder |
| Loss on Drying | ≤5% |
| Solubility | Clear solution |
| Absorptivity | (λ max: 442.4nm) ≥600 |
| Visual Transition Interval | From pH 1.2 (red) to pH 2.7 (yellow) |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Shelf Life | 60 months |
| Acidity | Neutral |
Identification
| Property | Value |
|---|---|
| CAS Number | 554-73-4 |
| Molecular Formula | C18H14N3O3SNa |
| Molecular Weight | 375.38 |
| SMILES | C1=CC=C(C=C1)NC2=CC=C(C=C2)N=NC3=CC=C(C=C3)S(=O)(=O)[O-].[Na+] |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 3212.90.0050 |
| Tariff Code | 3212900000 |
Safety & GHS
-
Explosive
GHS01
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
For research and industrial use only
Documents
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.
Pricing & pack sizes
Synonyms
No alternate names recorded for this product.
Frequently asked questions
What is Tropaeolin OO used for?
Tropaeolin OO is primarily used as a pH indicator in analytical chemistry, particularly in titrations involving weak acids and bases.
What is the chemical formula and molecular weight of Tropaeolin OO?
The formula is C18H14N3O3SNa and the molecular weight is 375.38 g/mol.
How should Tropaeolin OO be stored?
It should be stored at ambient temperature, protected from moisture and light.
What grade of Tropaeolin OO is available?
Molekula supplies Tropaeolin OO in analytical grade.
Can Molekula supply Tropaeolin OO in bulk?
Yes, Molekula can supply Tropaeolin OO in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with a Tropaeolin OO order?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) with the shipment.
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.