Permanent white

If treatment with ammonia gave a flocculent precipitate (ferric or aluminium hydroxide), the weighed zinc oxide is dissolved in dilute hydrochloric acid, the solution treated with ammonium chloride and excess of ammonia, and the precipitate collected, washed, again dissolved in hydrochloric acid and reprecipitated with ammonium chloride and ammonia the precipitate thus obtained is collected, washed, calcined and weighed. The weight of the ferric oxide and alumina thus obtained is deducted from that of the zinc oxide previously found. 

Zinc occurring as Oxide.—5 grams of the substance are placed in a 250 c.c. measuring flask with 100 c.c. of dilute acetic acid (50 grams per litre), which in the cold dissolves only the zinc present in the form of oxide (or carbonate), The flask is well shaken for a considerable time, the liquid then made up to the mark with water and filtered and the zinc in 200 c.c. of the filtrate (=4 grams of original substance) precipitated as sulphide as above. 

Zinc occurring as Sulphide.—This is calculated by difference from the two preceding determinations. (Zinc oxide corresponding with the total zinc) minus (zinc oxide present as such) — (zinc oxide corresponding with sulphide) ZnO x 1 19749 — ZnS. 

Insoluble Matter (barium sulphate).—The residue insoluble in hydrochloric acid remaining from the determination of the total zinc (paragraph 4) is collected on a filter, washed, dried, calcined and weighed. This weight, if extraneous insoluble substances are absent, represents the barium sulphate. 

Good lithopone should contain not more than traces of soluble salts and impurities, especially ferric oxide, and should not contain added extraneous substances. The proportion of zinc oxide should not be more than 2—3% and the moisture usually amounts to 0-2-0-3%. In some cases,however, zinc oxide is present in considerable amount and moisture to the extent of x-2%. 

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Blanc fixe, blano. flxe, permanent white, blanchieren, v.t. blanch, whiten. 

Blank-draht, m. bright wire galvanized wire, -film, m. (Photog.) film base. -fix. blanc fixe, permanent white, -holz, n. logwood, blankkochen, v.t. (Sugar) boil down without gr ning. 

Permanent-gelb, n. permanent yellow, -rot, n. permanent red, red toner. -weUs, n. permanent white. 

Moderate depression Decrease dose by 50%. If condition remains stable, continue reduced dosage. If symptoms improve and are stable for > 4 weeks, continue reduced dosage regimen or return to normal dose Severe depression Discontinue PEG-interferon a-2b permanently White blood cell count neutrophil count <750/mm or platelet count <80,000/mm Decrease dose by 50%... 

High exposure permanent white, blue, or black smoke heavy soot deposits, especially near emission points widespread worker complaints CO2 levels in excess of 1000 ppm and/or CO levels in excess of 10 ppm or NOj levels above the exposure limit controls likely not adequate immediate cessation of operations and decision on new control strategy before resnming reevaluation required... 

SYNS ACTYBARYTE ARTIFICIAL BARITE ARTinCIAL HEAVY SPAR BAKONTAL BARIDOL BARITE BARITOP BAROSPERSE BAROTRAST BARYTA VCTIITE BARYTES BAYRITES BLANC FIXE C.1.77120 C.I. PIGMENT WHITE 21 CITOBARYUM COLONATRAST ENAMEL WHITE ESOPHOTRAST EWEISS E-Z-PAQUE FINEMEAL LACTOBARYT LIQUIBARINE MACROPAQUE NEOBAR ORATRAST PERMANENT WHITE PRECIPITATED BARIUM SULPHATE RAYBAR REDI-FLOW SOLBAR SULFURIC ACID, BARIUM SALT (1 1) SUPRAMIKE TRAVAD UNIBARYT... 

OZIDE OZLO PASCO PERMANENT WHITE PHILOSOPHER S WOOL PROTOXTYPE 166 RED-SEAL-9 SNOW WHITE WHITE SEAL-7 ZINCITE... 

PERMA KLEER TETRA CP see EIVOOO PERMA KLEER 50, TRISODIUM SALT see TNL250 PERMANENT WHITE see ZKAOOO PERMANENT WHITE see BAPOOO PERMANENT YELLOW see BAK250 PERMANGANATE of POTASH (DOT) see PLPOOO PERMANGANATE de POTASSIUM (FRENCH) see PLPOOO... 

Barium Sulphate—BaSO,—232.8—occurs in nature as heavy ifpar and is formed as an amorphous, white powder, insoluble in acids, by double decomposition between a Ha salt and a sulphate in solution. It is insoluble in BLO and in acids. It is used os a pigment, permanent white. 

Tho solutions ot zinc are precipitated white by tho pure aLkalles and carbonate of ammonia, but are completely redissolved by excess of tbo precipitant. The carbonates of potassa and soda give a permanent white precipitate of carbonate of zinc. Hydrosulpburet of ammonia also gives a white precipitate, and so does sulphuretted hydrogen when the solution is quite neutral, Prussiate of potash ves a gelatinous white, or bluish-wbite precipitate. 

PERMANENT WHITE (1314-13-2) (1314-13-2) see zinc oxide. PERMANGANATE d AMMONIUM (French) (13446-10-1) see ammonium permanganate. 

PERMANENT WHITE (I3I4-13-2) Incompatible with linseed oil, magnesium, chlorinated rubber (at 419°F/215°C). Slowly decomposed by water. 

PERMANENT WHITE (7727-43-7) Violent reaction with dimethyl sulfoxide, sodium acetylide, finely divided carbon, aluminum, magnesium, zirconium, and possibly other active metals, especially in the presence of elevated temperatures. Incompatible with potassium, phosphorus. 

SYNONYMS amalox, azo-33, permanent white, snow white, zinc peroxide, zinc white, zincite, zincoid. 

To standardize the mercuric nitrate, pipette 10 ml of O.lN potassium chloride into a 250-ml Erlenmeyer flask then add 40 ml of water (measured with a graduate) and 3 drops of 10 per cent sodium nitroprusside. Titrate with mercuric nitrate, shaking well between additions as the end point is neared. The end point is marked by a permanent white turbidity and is quite sharp. When the mercuric nitrate has been standardized, titrate the hexamminecobaltic chloride solution by the same procedure, taking care to have the volume of solution in the titration flask the same as in the standardization. The end point arrives somewhat early because of the reaction HgCh + Hg++—> 2HgCl+ but by performing the standardization and titration under similar conditions, with the final mercuric chloride concentrations almost the same, this error, which is small in any case, becomes quite negligible. 

The snlfate, as permanent white, is also used in paint, in x-ray diagnostic work, and in glassmaking. Barite is extensively used as a weighing agent in oil-well drilling flnids, and is nsed in making rubber. The carbonate has been used as a rat poison, while the nitrate and chlorate give colors in pyrotechny. All barium compounds that are water- or acid-soluble are poisonous. 

FELLING ZINC OXIDE FLOWERS OF ZINC HUBBUCK s WHITE K-ZINC OZIDE OZLO PASCO PERMANENT WHITE... 

Emar Felling zinc oxide Flores de zind Flowers of zinc Green seal-8 Hubbuck s white Kadox 15 Kadox 72 Kadox-25 ozide Ozlo Permanent white Philosopher s wool Powder base 900 Protox types 166, 167, 168, 169, 267, 268 Red seal-9 Snow white ... 

Vaill, R B. (1996). Learning as a way of being Strategies for survival in a world of permanent white water. San Francisco Jossey-Bass. 

Synonyms Artificial barite Artificial heavy spar Barite Barium sulfate (1 1) Baryta white Barytes Blanc fixe Blanc fixe (artificial, precipitated) Cl 77120 Enamel white Heavy spar Permanent white Pigment white 21 Precipitated barium sulfate Process white Sulfuric acid barium salt (1 1)... 

CAS 1314-13-2 EINECS/ELINCS 215-222-5 Synonyms Chinese white Cl 77947 Flowers of zinc Permanent white Philosopher s wool Pigment white 4 Zincite Zinc monoxide Zincoid Zinc white... 

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