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Mubychem Group, is a mature manufacturing company since generations. Engaged in manufacture and supply of Pharmaceutical Intermediates and Excipients, Oil field & fracturing chemicals, Specialty tailor made grades of chemicals in India. With several manufacturing facilities in India and world wide contacts and toll manufacturers we are exporting to all the countries in the world.. |
The company and associated units have certificates & accreditations like FDA - GMP approval; ISO-9001 Certified; "REACH" Registered; ISO-22000; Kosher Certified; Halal Certified; HACCP. We offer Commercial Pure & Pharmacopoeia IP BP USP FCC Food Grade ACS AR Analytical Reagent Grades of Chemicals |
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Soda Lime BP USP NF IP ACS Manufacturers
For MSDS Sheet Click MSDS of Soda Lime IP BP USP NF ACS Manufacturers
Soda Lime BP
DEFINITION
Soda Lime is a mixture of sodium hydroxide, or sodium hydroxide and
potassium hydroxide, with calcium hydroxide.
CHARACTERISTICS
White or grayish white
granules, or it
may be coloured with an indicator to show
when its absorptive capacity is exhausted. It absorbs about 20% of its
weight of carbon dioxide.
Partially soluble in
water; almost completely
soluble in 1M acetic acid.
IDENTIFICATION
A. When moistened with
hydrochloric acid and introduced on a platinum wire into a flame,
imparts a yellow colour to the flame.
B. A solution in 1M acetic
acid yields reaction C characteristic of calcium salts.
C. A suspension in water
is strongly alkaline to litmus paper.
TESTS
Hardness of granules
Shake 200 g on a sieve no. 2000 for 3 minutes using a mechanical
sieve shaker that reproduces in a uniform manner the circular and
tapping motion given to sieves in manual use and has a frequency of
oscillation of 282 to 288 cycles per minute. Place 50 g of the retained
material in a hardness pan 20 cm in diameter having a concave brass
bottom, 7.9 mm thick at the circumference, 3.2 mm thick at the centre
and with an inside spherical radius of curvature of 109 cm. Add 15 steel
balls, 7.9 mm in diameter, and shake on the mechanical sieve shaker for
30 minutes. Remove the steel balls, transfer the contents of the pan to
a sieve no. 2000 and again shake on the mechanical sieve shaker for 3
minutes. The material retained by the sieve weighs not less than 37.5 g.
Size of granules
Shake 500 g on a perforated plate of nominal pore size 6.70 mm; not
more than 5 g is retained. Then shake on a
sieve no. 4750; not more than 50 g is retained. Shake the un-retained
material on a sieve no. 1400; not more than 20 g passes through. Shake
the un-retained material on a sieve no. 600; not more than 7.5 g passes
through.
Loss on drying
When dried to constant weight at 105°, loses 14.0 to 21.0% of its
weight. Use 1 g.
Moisture absorption
Place 10 g in an open glass dish about 50 mm in diameter and 30 mm
high in a desiccator over
sulphuric acid (14%) and allow
it to remain for 24 hours. The increase in weight is not more than 7.5%.
Carbon dioxide absorption
The activity is not less than 120 minutes when determined by the
following method.
Use a vertically-clamped tube of glass or other suitable transparent
material about 25 cm long and 29 to 31 mm internal diameter with
closely fitting rubber bungs at each end; the bungs are bored to
receive polythene or glass tubing of about 8 mm external diameter, the
tubing being flush with the inner ends of the bungs. With the lower bung
in position, place sufficient nylon mesh support on top of the bung to
produce a bed of mesh about 10 cm deep and
press a closely fitting disc of stainless steel gauze of nominal mesh
aperture about 500 µm on top of the nylon mesh so that its surface is
at right angles to the axis of the tube. Introduce 59.8 to 60.2 g of the
substance being examined onto the steel gauze in three portions, tamping
lightly after the addition of each portion. Place a second disc of steel
gauze on top, followed by a sufficient quantity of nylon mesh such that
the soda lime is kept consolidated by slight pressure when the second
bung has been inserted. The exit tube is connected to a condenser,
consisting of two 50 ml separating funnels, leading to a drying tube
packed with anhydrous calcium chloride and then to a carbon
dioxide analyzer sufficiently sensitive to
detect 0.2% v/v of carbon dioxide. A katharometer,
calibrated for carbon dioxide and preferably used in conjunction with a
chart recorder, is suitable.
Using the gas analyzer in accordance with
the manufacturer's instructions, accurately
determine the carbon dioxide content, p, as a percentage v/v, of
a nominal 5% carbon dioxide mixture, the balance gas being oxygen, air
or nitrogen as appropriate to the type of gas analyzer being used. Suitable compressed gas mixtures are
available commercially. Assemble the apparatus described above and pass
the gas mixture downwards into the absorption tube at a rate of 900 cm3
per minute until such time that the gas analyzer shows the content of carbon dioxide in the effluent gas
to have risen to 0.2% v/v. Steps should be taken to vent the effluent
gas if an oxygen-carbon dioxide mixture is being used. Record the time
taken, t, in minutes. The activity of the soda lime is
given, in minutes, by the expression tp/5.
Soda Lime USP NF
Soda Lime
Soda Lime is a mixture of Calcium Hydroxide and Sodium or Potassium
Hydroxide or both.
It may contain an indicator that is inert toward anesthetic gases such as Ether, Cyclopropane, and Nitrous Oxide, and that changes color when the Soda Lime no longer can absorb Carbon Dioxide.
Identification—
A: Place a granule of it on a piece of moistened red litmus paper:
the paper turns blue immediately.
B:
A solution in 6 N acetic acid responds to the tests for Calcium
191 . It also imparts a yellow
color to a non-luminous flame that, when viewed through cobalt glass,
may show a violet color.
Loss on drying—
Weigh accurately, in a tarred
weighing bottle, about 10 g, and dry at 105 for 2 hours: it loses
between 12.0% and 19.0% of its weight.
Moisture absorption— Place about 10 g in a
tarred, 50-mL weighing bottle, having a diameter of 50 mm and a
height of 30 mm, and weigh. Then place the bottle, with cover removed,
for 24 hours in a closed container in which the atmosphere is maintained
at 85% relative humidity by being in equilibrium with sulfuric acid
having a specific gravity of 1.16. Weigh again: the increase in weight
is not more than 7.5%.
Hardness—
Screen 200 g on a mechanical sieve shaker having a
frequency of oscillation of 285 ± 3 cycles per minute, for 3 minutes, to
remove granules both coarser and finer than the labeled particle size.
Proceed as directed in the test for Hardness under Barium
Hydroxide Lime, beginning with “Weigh 50 g of the granules.” The
percentage of Soda Lime retained on the screen is not less than 75.0,
and represents the hardness.
Carbon dioxide absorbency—
Fill the lower transverse section of a
U-shaped drying tube of about 15-mm internal diameter and 15-cm height
with loosely packed glass wool. Place in one arm of the tube about 5 g
of anhydrous calcium chloride, and accurately weigh the tube and the
contents. Into the other arm of the tube place 9.5 g to 10.5 g of Barium
Hydroxide Lime, and again weigh accurately. Insert stoppers in the open
arms of the U-tube, and connect the side tube of the arm filled with
Barium Hydroxide Lime to a calcium chloride drying tube, which in turn
is connected to a suitable source of supply of carbon dioxide. Pass the
carbon dioxide through the U-tube at a rate of 75 mL per minute for 20 minutes, accurately timed. Disconnect the
U-tube, cool to room temperature, remove the stoppers, and weigh. The
increase in weight is not less than 19.0% of the weight of Soda Lime
used for the test.
Particle size— Screen 100 g for 5 minutes as directed, using a
mechanical shaker. It passes completely through a No. 2 standard-mesh
sieve, and not more than 2.0% passes through a No. 40 standard-mesh
sieve. Not more than 7.0% is retained on the coarse-mesh sieve, and not
more than 15.0% passes through the fine-mesh sieve designated on the
label (as agreed between the buyer and the seller.
ACS Specifications
American Chemical Society
Soda Lime ACS
CAS Number 8006-28-8
NOTE. Soda lime is a mixture of variable proportions of sodium
hydroxide with calcium oxide or hydroxide. This reagent may or may not
include an indicator.
REQUIREMENTS
Carbon dioxide absorption capacity: 19.0%
MAXIMUM ALLOWABLE
Loss on drying at 200C: 7%
Fines: 1%
Soda Lime BP USP NF ACS Manufacturers:
MUBY CHEMICALS GROUP
DONGRI-CHINCHBUNDER, MUMBAI 400009, INDIA
TEL: (OFFICE)
91-22-23770100, 91-22-23726950, 91-22-23774610, 23723564.
e-mail: info@mubychem.com
