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  2. Hypophosphorous acid - Wikipedia

    en.wikipedia.org/wiki/Hypophosphorous_acid

    HPA is usually supplied as a 50% aqueous solution and heating at low temperatures (up to about 90 °C) prompts it to react with water to form phosphorous acid and hydrogen gas. H 3 PO 2 + H 2 O → H 3 PO 3 + H 2. Heating above 110 °C causes hypophosphorous acid to undergo disproportionation to give phosphorous acid and phosphine. [7] 3 H 3 PO ...

  3. List of UN numbers 3101 to 3200 - Wikipedia

    en.wikipedia.org/wiki/List_of_UN_numbers_3101_to...

    UN Number Class Proper Shipping Name UN 3101: 5.2: Organic peroxide type B, liquid : UN 3102: 5.2: Organic peroxide type B, solid UN 3103: 5.2: Organic peroxide type C, liquid

  4. Schlenk line - Wikipedia

    en.wikipedia.org/wiki/Schlenk_line

    A Schlenk line with four ports. The cold trap is on the right. Close-up view, showing the double-oblique stopcock, which allows vacuum (rear line) or inert gas (front line) to be selected. The Schlenk line (also vacuum gas manifold) is a commonly used chemistry apparatus developed by Wilhelm Schlenk. [1] It consists of a dual manifold with ...

  5. Inert gas - Wikipedia

    en.wikipedia.org/wiki/Inert_gas

    The term inert gas is context-dependent because several of the inert gases, including nitrogen and carbon dioxide, can be made to react under certain conditions. [1] [2] Purified argon gas is the most commonly used inert gas due to its high natural abundance (78.3% N 2, 1% Ar in air) [3] and low relative cost.

  6. HAZMAT Class 2 Gases - Wikipedia

    en.wikipedia.org/wiki/HAZMAT_Class_2_Gases

    A gas is a substance which (a) at 50 °C (122 °F) has a vapor pressure greater than 300 kPa (43.51 PSI) or (b) is completely gaseous at 20 °C (68 °F) at a standard pressure of 101.3 kPa (14.69 PSI). Gases are assigned to one of three divisions division 2.1 Flammable gas; division 2.2 Non flammable, Non-toxic gas; division 2.3 Toxic gas

  7. Chicken manure - Wikipedia

    en.wikipedia.org/wiki/Chicken_manure

    Chicken manure is the feces of chickens used as an organic fertilizer, especially for soil low in nitrogen. [1] Of all animal manures, it has the highest amount of nitrogen, phosphorus, and potassium. [2] Chicken manure is sometimes pelletized for use as a fertilizer, and this product may have additional phosphorus, potassium or nitrogen added. [3]

  8. Cryopump - Wikipedia

    en.wikipedia.org/wiki/Cryopump

    In this function, they are called a cryotrap, waterpump or cold trap, even though the physical mechanism is the same as for a cryopump. Cryotrapping can also refer to a somewhat different effect, where molecules will increase their residence time on a cold surface without actually freezing ( supercooling ).

  9. Poultry farming - Wikipedia

    en.wikipedia.org/wiki/Poultry_farming

    Meat chickens, commonly called broilers, are floor-raised on litter such as wood shavings, peanut shells, and rice hulls, indoors in climate-controlled housing. Under modern farming methods, meat chickens reared indoors reach slaughter weight at 5 to 9 weeks of age, as they have been selectively bred to do so. In the first week of a broiler's ...

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