1344-95-2 Usage
Description
Calcium silicate is a hydrous or anhydrous silicate with varying proportions of calcium oxide and silica, occurring in nature in mineral form and consisting of different ratios of CaO and SiO4. It can be prepared by calcining the oxide with silica at an elevated temperature and is commonly used as a safe alternative to asbestos for high-temperature insulation materials.
Uses
Used in Anticaking Applications:
Calcium silicate is used as an anticaking agent for enhancing flowability in salt under extremely high humidity conditions. It is also used in baking powder and fabricated chips to absorb water or other liquids.
Used in Cosmetics:
Calcium silicate is used as an anticaking agent, suspension agent, pigment, and pigment extender in a range of different cosmetic products, such as face powders and eye shadow.
Used in Table Salt, Foods, Pharmaceuticals, and Agricultural Pesticides:
Calcium silicate is used as an anticaking agent in these industries to improve the flowability and prevent clumping of products.
Used in Building Materials:
Calcium silicate compounds are heavily used as a building material, constituting the main ingredient in today's cement clinker.
Used in Industrial Insulation:
Calcium orthosilicate, a form of calcium silicate, is used as a replacement for asbestos in thermal insulation for industrial grade piping and equipment.
Used in Lime Glass and Portland Cement:
Calcium silicate is a constituent, produced in situ, of lime glass and portland cement.
Used in Elastomers and Plastics:
Calcium silicate serves as a reinforcing filler in elastomers and plastics, enhancing their structural properties.
Used in Chromatography:
Calcium silicate is utilized as a binder for refractory material and in chromatography for separating mixtures.
Used in Road Construction:
Calcium silicate is employed in road construction for its binding and reinforcing properties.
Production Methods
Calcium silicate is made in various ways by reacting siliceous material (such as diatomaceous earth) and calcium compounds (such as calcium hydroxide (Ca (OH) 2).The refinement of wollastonite ore into high-grade wollastonite was originally done by manual selection at many mines. This process is now performed by screening and magnetic separators, sometimes in combination with flotation and vacuum filtration. Grinding and milling operations can produce variable mesh powders or aggregates.
Preparation
Calcium silicate is a naturally occurring mineral, but for commercial applications it is usually prepared from lime and diatomaceous earth under carefully controlled conditions.
Hazard
Irritating dust. Use in foods restricted to
5% in baking powder, 2% in table salt. Upper res-
piratory tract irritant. Questionable carcinogen.
Health Hazard
The toxicity of calcium silicate
depends on particle size, aspect ratio, and
amount of silica and respirable fiber.1 Synthetic
nonfibrous calcium silicate is considered to be
a nuisance dust.
Skin irritation was reported in a worker
exposed to an atmosphere permeated with calcium silicate.1 A study of 104 wallastonite (a
naturally occurring calcium silicate mineral)
miners showed no relationship between the
prevalence of chronic bronchitis or airflow
obstruction with increasing exposure.1 In a
cohort mortality study of wollastonite quarry
workers the observed numbers of deaths from
all cancers combined and lung cancer were
lower than expected.
Flammability and Explosibility
Notclassified
Pharmaceutical Applications
Calcium silicate (Ca2SiO4) is used in the pharmaceutical industry as an anticaking agent. Anti-caking agents absorb moisture and allow products to flow freely during the manufacturing process. It is also used as a filler aid for oral pharmaceuticals. It has also been used in pharmaceutical preparations as an antacid.
Safety Profile
A nuisance dust
Safety
GRAS listed. Included in the FDA Inactive Ingredients Database (oral dosage forms). Included in nonparenteral (oral, orodispersible, effervescent and enteric-coated tablets) formulations licensed in the UK.calcium silicate is generally recognized as safe (GRAS) when used at levels not exceed 2% in table salt and 5% in baking powder.
storage
Calcium silicate is chemically stable and nonflammable, but it
should be protected from moisture. Store in airtight containers in a
cool, dry place.
Incompatibilities
None reported [Note: After prolonged contact with water, solution reverts to soluble calcium salts & amorphous silica.]
Regulatory Status
Calcium silicate (E552) is listed in Commission Regulation (EU) No 231/2012 as an authorised food additive and categorized as “additives other than colours and sweeteners”. It is an approved ingredient in Australia and New Zealand with the code number 552.
Check Digit Verification of cas no
The CAS Registry Mumber 1344-95-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,4 and 4 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1344-95:
(6*1)+(5*3)+(4*4)+(3*4)+(2*9)+(1*5)=72
72 % 10 = 2
So 1344-95-2 is a valid CAS Registry Number.
InChI:InChI=1/2Ca.O4Si/c;;1-5(2,3)4/q2*+2;-4
