Potassium hydrogen phthalate solution, 250 ml
Boiling point (bp) 100 °C
Melting point (mp) 0 °C
ADR 8 III
excl. VAT. | 250 ml per Pack Qty.
Art. No. 2055.1
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.
- Subtotal: 0.00
|Order No.||Pack Qty.||Pack.||Price||Quantity|
Available from stock Karlsruhe
Available at short notice
Delivery date currently unknown
Determination of chemical oxygen demand (COD)
COD (chemical oxygen demand) is a measure of all the oxidisable components in water under specific conditions. The water sample is mixed with sulphuric acid and heated together with a defined quantity of potassium dichromate, with silver sulphate added as the catalyst. Chloride must be removed beforehand or masked with mercury sulphate. The remaining potassium dichromate is measured by means of titration, using an ammonium iron(II) sulphate solution and ferroin as the indicator. The equivalent amount of oxygen can then be calculated from the amount of potassium dichromate that is used up.