NTP 10th Report on Carcinogens. IARC Cancer Review: Group 2A IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 341.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 42 ,1988,p. 209.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 42 ,1988,p. 209.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Reported in EPA TSCA Inventory.

OSHA PEL: Total Dust: TWA 30 mg/m³/2(%SiO₂+2) TWA Respirable Fraction: 0.05 mg/m³
ACGIH TLV: TWA Respirable Fraction: 0.05 mg/m³
DFG MAK: 0.15 mg/m³
NIOSH REL: (Silica, Crystalline) TWA 50 μg/m³

For occupational chemical analysis use OSHA: #ID-125G or NIOSH: Silica, Crystalline (XRD), 7500; (Color), 7601; (IR), 7602.

The IUPAC name of this chemical is Silica,crystalline-cristobalite. With the CAS registry number 14464-46-1 and EINECS 238-455-4, it is also named as Crystoballite. In addition, the molecular formula is O₂Si and the molecular weight is 60.0843. It belongs to the classes of Inorganic & Organic Chemicals and Inorganics. It is white amorphous superfine powder. It should be stored in a cool, ventilated and dry place. What's more, it can be used in bonding phosphor with glass plane, such as electronic tube, projection tube and depending on the wave tube.

Physical properties about this chemical are: (1)H-Bond Acceptor: 2; (2)Rotatable Bond Count: 0; (3)Exact Mass: 59.966756; (4)MonoIsotopic Mass: 59.966756; (5)Topological Polar Surface Area: 34.1; (6)Heavy Atom Count: 3; (7)Complexity: 18.3; (8)Covalently-Bonded Unit Count: 1; (9)#H bond acceptors: 2; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 0; (12)Polar Surface Area: 34.14 Å².

Preparation of Silica,crystalline-cristobalite: it can be prepared by Sodium silicate solution and nitric acid.

When you are using this chemical, please be cautious about it as the following:
It has danger of serious damage to health by prolonged exposure through inhalation.You should not breathe dust when during using it.

You can still convert the following datas into molecular structure:
(1)SMILES: O=[Si]=O
(2)InChI: InChI=1S/O2Si/c1-3-2
(3)InChIKey:  VYPSYNLAJGMNEJ-UHFFFAOYSA-N

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
human	TCLo	inhalation	16mppcf/8H/17 (16mppcf)	LUNGS, THORAX, OR RESPIRATION: "FIBROSIS, FOCAL (PNEUMOCONIOSIS)" LUNGS, THORAX, OR RESPIRATION: COUGH LUNGS, THORAX, OR RESPIRATION: DYSPNEA	National Technical Information Service. Vol. PB246-697,
rat	LDLo	intratracheal	200mg/kg (200mg/kg)	LUNGS, THORAX, OR RESPIRATION: "FIBROSIS, FOCAL (PNEUMOCONIOSIS)"	British Journal of Industrial Medicine. Vol. 10, Pg. 9, 1953.