HS Code: 3808.92.95
Molecular Formula: As2CrCuO9
Product name: Oxide CCA-C 60% Type C, paste
Chemical Names: CCA-C; Copper Arsenate, Chromated; HSDB 7705;
Arsenic acid (H3AsO4), copper(2+) salt (2:3), chromated;
We supply Copper Arsenate, Chromated, CCA Type-C Wood Preservative 60% in form of paste, density 1800-1900 kg/m3, diluted in cold water at ratio 1:40.
Manufacturer’s instruction on paste dilution: For wood pressure treatment CCA-C paste to be diluted in cold water in the ratio 1:40 (one part of CCA-C paste to 40 parts of cold water). Thus, one drum of 48-50 liters (net weight 90kg) is dissolved in 2000 liters of cold water. From one 50-liter drum of CCA paste - 2050 liters of treating (working) solution is obtained.
Consumption at autoclaving 100 liters of treating (working) solution to 1 m3 of wood.
ELEMENTAL CONCENTRATION IN 20G/L TREATING SOLUTION OF PRESERVATIVE:
Oxide CCA-C 60% Paste is the copper-chromium-arsenic mixture in the form of paste. When the paste is diluted in ratio 1:40 of cold water the elemental concentrations of copper, chromium and arsenic in the treating solution of preservative complies with the data given in table 1:
Table 1. Active Elements Concentrations in CCA-C working solution (20 g/L), as per COA
|Active Element||Concentration (g/L) as per COA||Concentration (g/L) as per standard SANS 673:2008|
|Cu||1.68||1,61 – 1,99|
|Cr||2.96||2,74 – 3,11|
|As||2.76||2,32 – 2,93|
Concentration of active elements in our Copper Arsenate, Chromated, Paste (in terms of g/L) complies with the requirements of standard SANS673:2008, Clause 3.2.
OXIDE CONCENTRATIONS IN OXIDE CCA-C 60% PASTE:
Table 2: Oxide Concentrations, % as per COA
|Oxide form|| |
Concentration (%, m/m)
as 60% oxide basis
Concentration (%,m/m) according to Russian standard
TU 2499-001-78576072-2009 requirements
|CuO||10.50||9 - 11|
|CrO3||28.40||22 - 29|
|As2O5||21.10||21 - 26|
Note: Total oxide concentration shows 60% as stipulated on our Copper Arsenate, Chromated Paste label and MSDS.
COMPLIANCE WITH AWPA STANDARD:
In order to check compliance of Oxide CCA 60% Paste (as per COA results) with the American Wood Protection Association (AWPA) standards, the oxides concentration as per COA (60%) are converted to a 100% oxide basis:
Table 3: Oxides concentrations upon conversions to 100% oxide basis
|Oxide form|| |
Concentration of Oxide CCA-C 60% Paste, as 100% oxide basis, (%, m/m)
|CuO||17.0% – 21.0%||17,5|
|CrO3||44.5% – 50.5%||47,33|
|As2O5||30.0% – 38.0%||35,17|
Our Oxide CCA-C 60% Paste complies with the specifications stipulated by AWPA for CCA-C Type C in standard AWPA P23-08.
Table 4: Summary of Oxide CCA-C 60% Paste
|Active Element||Elemental Concentration (g/L)||Elemental Concentration (g/kg)||Oxide Form||Concentration (%) as 100% oxide basis||Concentration (%) as 60% oxide basis|
The data shown above demonstrate that Copper Arsenate, Chromated 60% Paste sold by Hippocampus OU complies to all specifications as stipulated by the SANS (South African Bureau of Standards), AWPA (American Wood Protection Association) as well as that of the Russian manufacturer standard TU 2499-001-78576072-2009 .
The concentrations listed above may vary according to the limits stipulated in the standards’ requirements listed above, accordingly.
Chromated Copper Arsenate (CCA-C) is a wood preservative, a copper-chromium-arsenic mixture produced in the form of paste or liquid. The mixture is diluted in accordance with the manufacturer's instructions to give the treating solution a nominal total elemental concentration of copper, chromium and arsenate of 7,3 g/l. A 7,3 g/L total elemental concentration treating solution is equivalent to a 20 g/L solution of a preservative where the copper, chromium and arsenic are expressed as copper sulphate pentahydrate, sodium dichromate dehydrate and arsenic pent oxide dehydrate, respectively.
CCA-C is the world’s most widely used wood preservative. It is manufactured to national and international standards depending on the country of intended use, including AWPA P23-10 for the USA and SANS 673 for South Africa, TU 2499-001-78576072-2009 for Russia and each manufacturer complies with these standards.
Plastic drums 48-50 liters (net weight 90kg); 6 drums pallet; 10 pallets 20ft container
Plastic drums 227 liters (net weight 400 kg); 4 drums pallet; 10 pallets 20ft container
Min order quantity: one 20 ft container.
Video #1: CCA Oxide 60% Type C Paste fractions.
Video description: After a long carriage or storage the paste splits up in two fractions, liquid and solid. The solid fraction is the mixture of Cu and Chromium Oxides that couldn’t be dissolved in such a small volume of water, thus in 60% CCA oxide solution it is in the un-dissolved state, precipitating at the bottom of a packaging.
Video #2: CCA oxide 60% paste mixing up before pour off the packaging.
Video description: In this video, we will show you what should be done prior the CCA oxide 60% paste is going to be poured off the packaging. Here is the drum with CCA oxide 60% paste that has been stored for a while in warehouse. Have a look there is the solid fraction that has precipitated at the bottom. The solid fraction is the mixture of Copper and Сhrome Oxides that couldn’t be dissolved in such a small volume of water, thus, in 60% CCA oxide solution it is in undissolved state. Before pouring it off the packaging it should be mixed thoroughly in order to become a homogeneous mixture and could pour out of packaging smoothly.