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Detecting free Iron : Spray the surface with a solution of potassium ferricyanide. If free iron is present, a blue color will appear. This test is extremely sensitive and often gives false positive results, that is, it gives an indication of iron being present when it really is not. The ferroxyl solution must be made fresh each day by addition with Nitric acid. The ferroxyl tests are described in ASTM A380.
Ferroxyl indicator is a solution containing potassium hexacyanoferrate(III) and phenolphthalein. It turns blue in the presence of Fe2+ ions, pink in the presence of hydroxide ions, it can be used to detect metal oxidation. It is often used to detect rusting in various situations.
It can be prepared by dissolving 10g sodium chloride and 1g potassium hexacyanoferrate(III) in distilled water, adding 10 cm3 phenolphthalein indicator, then making up to 500 cm3 with distilled water.
Red prussiate, Prussian red, Potassium hexacyanoferrate(III)
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...
Vinylidene Chloride (VDC)
Vinylidene chloride, also called 1,1-dichloroethylene, a colourless, dense, toxic, volatile, flammable liquid belonging to the family of organic halogen compounds, used principally in combination with vinyl chloride, acrylonitrile, or methyl methacrylate for the manufacture of a class of plastics called saran. Vinylidene chloride is also used as a starting material for making methylchloroform, or 1, 1, 1-trichloroethane, and a solvent useful in cleaning electrical machinery.
1,1-dichloroethylene
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...
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Bromocresol green AR |
pH Indicator | |
|
C 21 H 14Br4O 5S |
m.w.698.04 | |
| pH transition range | pH 3.8 -5.4 | |
| Yellowish green-Blue | ||
| Loss on drying (110oc) | < 3% | |
| Glass Bottle | Pkg.5gm. |
BCG pH Indicator
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...
Lab Grade LR Methanol 2.5 Ltr Glass Bottle
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...
Indole TEST : ( Indole produced by microorganisms )
The ability to degrade amino acid to identify end products to differentiate bacteria.Indole can be detected to the culture growth ( Pure bacterial culture must be grown in sterile tryptophan or peptone broth for 24-48 hours before performing the test. ) by reaction with 5 drops of Kovac’s reagent to produce a red or red violet colour.
KOVAC’S Reagent - ( para-Dimethylaminobenzaldehyde in isoamyl alcohol and Concentrated hydrochloric acid )
Ehrlich Reagent - ( para-Dimethylaminobenzaldehyde in ethyl alcohol and Concentrated hydrochloric acid )
INDOLE TEST is suitable for
Indole-Positive Bacteria that test positive for cleaving indole from tryptophan include: Aeromonas hydrophilia, Aeromonas punctata, Bacillus alvei, most Citrobacter sp., Edwardsiella sp., Escherichia coli,Flavobacterium sp., Haemophilus oxytoca, Proteus sp. (not P. shigelloides, Pasteurella pneumotropica, Streptococcus faecalis and Vibrio species. Bacteria which give negative results for the indole test include: Actinobacillus spp., Aeromonas salmonicida, Alcaligenes sp., most Bacillus sp., Bordetella sp., Enterobacter sp.,Lactobacillus spp., most Haemophilus sp., most Klebsiella sp., Neisseria sp., Pasteurella haemolytica, Pasteurella ureae, Proteus mirabilis, Pseudomonas sp., Salmonella sp., Serratia sp., Yersinia sp.50, 51 Kitasato's discovery that Escherichia coli could be distinguished from Klebsiella species (Aerobacter aerogenes) by virtue of its ability to produce indole initiated the detection of indole production as an accepted analytical tool for the bacteriologist
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...
Glycolethylether, 1,4-Diethylene dioxide, 1,4-Dioxacyclohexane
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Fujairah, Sharjah, Umm Al Quwain, Ruwais, Khalifa Port, Jebel Ali, DP WORLD, and all UAE ports...