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Not more than 0.1 ml of 0.1N sodium hydroxide is required to change the colour to pink Readily carbonizable substances Place 5 ml of the sample in a glass-stoppered test tube that has previously been rinsed with chromic acid cleaning mixture. Add 5 ml of sulfuric acid TS, and heat in a boiling water bath for 10 min. (...) Polycyclic aromatic hydrocarbons (Vol. 4) Passes test Solid paraffins Dry a suitable quantity of the substance to be examined by heating at 100o for 2 h and cool in a desiccator over concentrated sulfuric acid. Place in a glass tube with an internal diameter of about 25 mm, close the tube and immerse in a bath of iced water. After 4 h the liquid is sufficiently clear for a black line, 0.5 mm wide against a white background held vertically behind the tube, to be easily seen. Lead (Vol. 4) Not more than 1 mg/kg Determine using an atomic absorption technique appropriate to the specified level.
Language:English
Score: 1752703.3 - https://www.fao.org/fileadmin/...onograph1/Additive-282-rev.pdf
Data Source: un
It is manufactured by digesting ilmenite (FeTiO3) or ilmenite and titanium slag with sulfuric acid and the product is diluted with water or dilute acid. (...) Colour reaction Add 5 ml sulfuric acid to 0.5 g of the sample, heat gently until fume of sulfuric acid appear, then cool. (...) Transfer the entire residue to the filter, and wash thoroughly with cold dilute sulfuric acid TS. Dilute the filtrate with water to 200 ml, and cautiously add about 10 ml of stronger ammonia TS to reduce the acid concentration to about 5% by volume of sulfuric acid.
Language:English
Score: 1477919.1 - https://www.fao.org/fileadmin/...cs/Monograph1/Additive-466.pdf
Data Source: un
A deep violet colour is produced which disappears on addition of 5 ml of dilute sulfuric acid TS. Reducing reaction A solution of the sample in water immediately reduces potassium permanganate TS without heating, producing a brown precipitate A solution of the sample in ethanol will decolourize a solution of 2,6- dichlorophenol-indophenol TS. PURITY Loss on drying (Vol. 4) Not more than 0.4% (over sulfuric acid in a vacuum, 24 h) Specific rotation (Vol. 4) [alpha] 25, D: Between +20.5 and +21.5o pH (Vol. 4) 2.4 - 2.8 (1 in 50 soln) Sulfated ash (Vol. 4) Not more than 0.1% Lead (Vol. 4) Not more than 2mg/kg Determine using an atomic absorption technique appropriate to the specified level. (...) METHOD OF ASSAY Dissolve about 0.400 g of the sample, previously dried in a vacuum desiccator over sulfuric acid for 24 hours, in a mixture of 100 ml of carbon dioxide-free water and 25 ml of dilute sulfuric acid TS.
Language:English
Score: 1428140.8 - https://www.fao.org/fileadmin/...cs/Monograph1/Additive-043.pdf
Data Source: un
A typical analysis of kieserite reveals 15.0% magnesium (25% as magnesium oxide, 75% as magnesium sulfate), 20.0% sulfur (as sulphate), up to 2.5% chlorides, and 12% water. (...) The material is separated from the mother liquor by centrifugation, dried and sieved. 3.2 Reaction of magnesium oxide and sulfuric acid Magnesium oxide is prepared by igniting magnesium hydroxide (obtained from sea water) or ignition of magnesite ore (consists of MgCO3). The magnesium oxide formed is then reacted with sulfuric acid to produce magnesium sulfate. The target product is recrystallized for higher purity.
Language:English
Score: 1413003.5 - https://www.fao.org/fileadmin/...a/cta/68/Magnesium_Sulfate.pdf
Data Source: un
PROPOSED ALTERNATE FLASH COMPOSITION TEST FOR FIREWORKS CLASSIFICATION USING THE DEFAULT TABLE / TRANSMITTED BY THE EXPERT FROM THE UNITED STATES OF AMERICA
. % Potassium Benzoate (fine powder)/ 10 wt.% Sulfur (fine powder)/10.5 wt. %Lampblack (nano-material) (...) Potassium Benzoate (fine powder)/ 10 wt. % Sulfur (fine powder)/10.5 wt. %Lampblack (nano- material) (...) % Potassium Perchlorate (100% 37 µ) /13.5 wt.% Potassium Benzoate (fine powder)/ 10% Sulfur (fine powder)/10.5%Lampblack (nano- material). 3.90, 1.00, 0.88 ( + ) Flash Composition 3 70% wt.
Language:English
Score: 1404201.6 - daccess-ods.un.org/acce...ST/SG/AC.10/C.3/2012/30&Lang=E
Data Source: ods
An ADI not limited' was established at the 9th JECFA (1965) SYNONYMS Caustic soda, lye, sodium hydrate, INS No. 524 DEFINITION Chemical names Sodium hydroxide C.A.S. number 1310-73-2 Chemical formula NaOH Formula weight 40.00 Assay Not less than 95.0% of total alkali calculated as NaOH DESCRIPTION White or nearly white pellets, flakes, sticks, fused masses or other forms FUNCTIONAL USES Alkali CHARACTERISTICS IDENTIFICATION Solubility (Vol. 4) Very soluble in water; freely soluble in ethanol Test for alkali A 1 in 100 solution of the sample is strongly alkaline Test for sodium (Vol. 4) Passes test PURITY Water insoluble substances 1 g of the sample dissolves completely in 20 ml of water and gives a clear and colourless solution Carbonate Not more than 3% as sodium carbonate Each ml of 1 N sulfuric acid required between the phenolphthalein and methyl orange end-points in the Method of assay is equivalent to 106.0 mg of Na2CO3 Lead (Vol. 4) Not more than 2 mg/kg Determine using an atomic absorption technique appropriate to the specified level. (...) METHOD OF ASSAY Dissolve about 1.5 g of the sample, accurately weighed, in 40 ml of recently boiled and cooled water, cool to 15o, add phenolphthalein TS and titrate with 1 N sulfuric acid. At the discharge of the pink colour, record the volume of acid required, then add methyl orange TS and continue to titrate to a persistent pink colour. Record the total volume of acid required for the titration. Each ml of 1 N sulfuric acid is equivalent to 40.00 mg of total alkali, calculated as NaOH.
Language:English
Score: 1392682.9 - https://www.fao.org/fileadmin/...cs/Monograph1/Additive-410.pdf
Data Source: un
An ADI “not specified’ was established for sodium sulfate at the 57th JECFA (2001) and no ADI was allocated for sulfuric acid at the 20th JECFA (1976). SYNONYMS Sodium acid sulfate; nitre cake; sodium bisulfate; sulfuric acid, monosodium salt. DEFINITION Sodium chloride and sulfuric acid are combined at elevated temperatures to produce molten sodium hydrogen sulfate.
Language:English
Score: 1392682.9 - https://www.fao.org/fileadmin/...monograph4/additive-503-m4.pdf
Data Source: un
An ADI not limited' was established at the 9th JECFA (1965) SYNONYMS Caustic potash, Potassium hydrate; INS No. 525 DEFINITION Chemical names Potassium hydroxide C.A.S. number 1310-58-3 Chemical formula KOH Formula weight 56.11 Assay Not less than 85.0% of total alkali calculated as KOH DESCRIPTION White or nearly white pellets, flakes, sticks, fused masses or other forms FUNCTIONAL USES Alkali CHARACTERISTICS IDENTIFICATION Solubility (Vol. 4) Very soluble in water; freely soluble in ethanol Test for alkali A 1 in 100 solution of the sample is strongly alkaline Test for potassium (Vol. 4) Passes test PURITY Water insoluble substances A 1 in 20 solution of the sample is complete, clear, and colourless Carbonate Not more than 3.5% (as potassium carbonate) Each ml of 1 N sulfuric acid required between the phenolphthalein and methyl orange endpoints in the "METHOD OF ASSAY" is equivalent to 138.2 mg of K2CO3. (...) METHOD OF ASSAY Dissolve about 1.5 g of the sample, accurately weighed, in 40 ml of recently boiled and cooled water, cool to 15o, add phenolphthalein TS and titrate with 1 N sulfuric acid. At the discharge of the pink colour, record the volume of acid required, then add methyl orange TS and continue to titrate to a persistent pink colour. Record the total volume of acid required for the titration. Each ml of 1 N sulfuric acid is equivalent to 56.11 mg of total alkali, calculated as KOH.
Language:English
Score: 1392682.9 - https://www.fao.org/fileadmin/...cs/Monograph1/Additive-339.pdf
Data Source: un
In the sulfate process, sulfuric acid is used to digest ilmenite (FeTiO3) or ilmenite and titanium slag. (...) Colour reaction Add 5 ml sulfuric acid to 0.5 g of the sample, heat gently until fumes of sulfuric acid appear, then cool. (...) To the cooled melt add 25 ml of sulfuric acid solution (1 in 2) and heat carefully and slowly until the melt is dissolved.
Language:English
Score: 1385433.1 - https://www.fao.org/fileadmin/...nograph10/additive-466-m10.pdf
Data Source: un
In the sulfate process, sulfuric acid is used to digest ilmenite (FeTiO3) or ilmenite and titanium slag. (...) Colour reaction Add 5 ml sulfuric acid to 0.5 g of the sample, heat gently until fumes of sulfuric acid appear, then cool. (...) To the cooled melt add 25 ml of sulfuric acid solution (1 in 2) and heat carefully and slowly until the melt is dissolved.
Language:English
Score: 1385433.1 - https://www.fao.org/fileadmin/...monograph7/additive-466-m7.pdf
Data Source: un