Jump to content Jump to navigation menu

Natural product reagent A, 25 g

≥98 %, p.a.
Examples of effect: Lead to damage to heath, cause irritation to eyes, skin or respiratory organs. Are fatal in larger quantities. Safety: As previously stated, in the event of skin irritation or contact with eyes, rinse with water or a suitable medium.
i causes skin irritation, causes serious eye irritation, may cause respiratory irritation
P280 P302+P352 P305+P351+P338
i wear protective gloves/protective clothing/eye protection/face protection, IF ON SKIN: Wash with plenty of water, IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing
Pack Qty.
Diphenylboric acid β-aminoethyl ester complex
Empirical formula C14H16BNO
Molar mass (M) 225,10 g/mol
Density (D) 1,2 g/cm³
Melting point (mp) 192 °C
Storage temp. +4 °C
CAS No. [524-95-8]

Biochemical analytical reagent for determination of flavonoids and vegetable acids.
Application: Natural substance-polyethylene glycol reagent (NST/PEG). Spray a 1 % methanol solution of natural substance reagent A and a 5 % ethanol PEG 4000 solution, one after the other onto the TLC-plate (approx. 10 ml and 8 ml). Intensive fluorescent colours will appear immediately or after 15 min in UV-365 nm. Adding PEG will lead to an increase in detection sensitivity (from 10 µg to 2.5 µg). The fluorescence behaviour depends on the structure. The reagent must be freshly prepared before use (1 % in methanol). Spray under the fume hood!

Natural product reagent A as a spray reagent: According to Wagner natural substance A is an excellent reagent for fluorometry in quantitative analysis of thin layer chomatogrammes.
Product details

€180.10/Pack Qty. 

excl. VAT. | 25 g per Pack Qty.

Art. No. 9920.2

In stock
Delivery fast, simple and reliable!
from 6 Pack Qty. €171.10/Pack Qty.
from 24 Pack Qty. €162.09/Pack Qty.
Carl Roth subscription service

Now recurring orders conveniently delivered as a subscription!

With the new Carl Roth Replenishment Service you can let products be ordered automatically which you need regularly in your lab!

How it works:

Put all products for your subscription in the desired quantity in the basket.


In the shopping cart, select the option "Order shopping cart as subscription" Order as subscription.


Set Starty point and interval for your subscription and submit order!

By the way: Through your account you can customize or delete your subscriptions anytime.

Product details

Natural product reagent A ≥98 %, p.a.

Natural product reagent A as a spray reagent: According to Wagner natural substance A is an excellent reagent for fluorometry in quantitative analysis of thin layer chomatogrammes.

Natural product reagent A
Selected quantity:   0
  1. Subtotal:  0.00
Order No. Pack Qty. Pack. Price Quantity
9920.1 5 g plastic


9920.2 25 g plastic


9920.3 50 g plastic


In stock
In procurement
Not available
Delivery date currently unknown
Selected quantity:   0
  1. Subtotal:  0.00

Downloads / MSDS

General information

Further attractive products to complete your chromatography laboratory can be found on our Chromatography page!

Thin Layer Chromatography (TLC)

Although the principle of thin-layer chromatography is more than a century old, it did not make its breakthrough as an analytical method until about 50 years ago.
Thanks to the development of new sorbents and supports, as well as increasing instrumentation and automation, TLC has become a versatile separation method. It is used both in qualitative analysis and in quantitative analysis.
Applications range from simple manual separation processes in classic TLC to automated processes in HPTLC (high performance thin layer chromatography).

Advantages of thin layer chromatography:

  • Higher sample throughput in less time
  • Suitable for screening tests
  • Pilot process for HPLC
  • The ready-to-use TLC layer functions as a data storage device for separation results
  • The separated substances can be used later for further analysis (e.g. IR, MS)
  • By switching the mobile and the stationary phases, the separation process can be optimised quickly and cost-efficient

Certificates of Analysis

You can search for and download your certificate of analysis for the selected product here. Please provide your batch number.
The following analysis certificates have been found:

Type analysis

Appearancewhite cryst. powder
Assay≥98 %
Melting point190-194 °C

0 Reviews

0.0 out of five stars