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Silicon dioxide CAS#7631-86-9

  • Silicon dioxide CAS#7631-86-9
  • Silicon dioxide CAS#7631-86-9
  • Silicon dioxide CAS#7631-86-9
  • Silicon dioxide CAS#7631-86-9
  • Silicon dioxide CAS#7631-86-9

Silicon dioxide CAS#7631-86-9

Stable and reliable performance: It has stable physical and chemical properties, acid, alkali, high temperature and corrosion resistance, suitable for diverse production scenarios.


Efficient and versatile functions: It has excellent adsorption, anti-caking, dispersing, thickening and thixotropic properties with good powder fluidity.


Safe and compliant: Non-toxic and non-irritating, environmentally friendly, compliant with standards for food, pharmaceutical and daily chemical industries.


Standard storage & operation: Store in sealed, dry, cool and ventilated conditions; keep away from corrosive materials. Wear dust-proof protective equipment, avoid moisture and damage, and use within shelf life.


Phone ：+86 18626059817
WhatsApp ：+86 18626059817
Email ：cora@wxqysteel.com
product description

Product Description of Silicon dioxide CAS#7631-86-9

Silicon dioxide is an inorganic non-metallic powder material. It is fine odorless and tasteless white powder under normal condition. It owns stable physical and chemical properties, hardly reacts with common acid and alkali, and keeps stable during storage.


Product Application of Silicon dioxide CAS#7631-86-9

Widely used in multiple industries, silicon dioxide can be used as anticaking agent, flow aid, adsorbent, thickener, reinforcing filler and matting agent. It is applied in food processing to prevent powder agglomeration, in pharmaceuticals as a safe pharmaceutical excipient, in rubber and plastic products to improve hardness and wear resistance, in daily cosmetics to adjust material texture, in feed industry to maintain material looseness, and in coatings and inks for thickening and matting to optimize coating molding effects, covering various industrial and civil production fields.

Product Information

Parameters


Melting point

>1600 °C(lit.)

Boiling point

>100 °C(lit.)

density

2.2-2.6 g/mL at 25 °C

bulk density

200-800kg/m3

vapor pressure

13.3hPa at 1732℃

refractive index

1.46

Fp

2230°C

storage temp.

2-8°C

solubility

Practically insoluble in water and in mineral acids except hydrofluoric acid. It dissolves in hot solutions of alkali hydroxides.

form

suspension

pka

6.65-9.8[at 20 ℃]

Specific Gravity

2.2

color

White to yellow

Odor

at 100.00%. odorless

PH

5-8 (100g/l, H2O, 20℃)(slurry)

Resistivity

1∞10*20 (ρ/μΩ.cm)

Water Solubility

insoluble

Sensitive

Hygroscopic

Hydrolytic Sensitivity

6: forms irreversible hydrate

Crystal Structure

Trigonal

Merck

148,493

Exposure limits

NIOSH: IDLH 3000 mg/m3; TWA 6 mg/m3

Stability:

Stable.

Cosmetics Ingredients Functions

BULKING

ABSORBENT

OPACIFYING

ABRASIVE

VISCOSITY CONTROLLING

ANTICAKING

InChI

1S/O2Si/c1-3-2

InChIKey

VYPSYNLAJGMNEJ-UHFFFAOYSA-N

SMILES

[Si](=O)=O

CAS DataBase Reference

7631-86-9(CAS DataBase Reference)

NIST Chemistry Reference

Silicon(iv) oxide(7631-86-9)

IARC

3 (Vol. Sup 7, 68) 1997

EPA Substance Registry System

Silica (7631-86-9)

ECETOC JACC REPORT

Silicon dioxide (7631-86-9)


Safety Information


Hazard Codes

Xn,Xi

Risk Statements

36/37/38-36/37-22-43-52/53-36/38

Safety Statements

26-37/39-36-36/37/39-36/37-61

OEB

B

OEL

TWA: 6 mg/m3

WGK Germany

nwg

RTECS

VV8853000


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We are a supply chain service provider rather than a single manufacturer. Instead of being tied to one specific factory, we have established deep partnerships with numerous high-quality domestic chemical enterprises that hold certifications such as ISO and REACH. This allows us to flexibly match the most suitable supply sources to your needs while independently conducting third-party quality inspections to ensure delivery quality and price competitiveness.
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We maintain transit warehouses with standing inventory in Southeast Asia, the Middle East, and Eastern Europe.
For you: You can pick up goods directly from local warehouses without the need for full-container orders; delivery times are reduced from the standard 30–45 days to just 3–5 days.
Reduced inventory pressure: You can purchase small batches for trial and quality verification before scaling up orders, avoiding the need to tie up large amounts of capital upfront.
Emergency restocking: If your production line faces a sudden material shortage, we can urgently dispatch supplies from our regional warehouses to prevent production downtime.
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For standard products, the MOQ is typically one 20-foot container (approx. 16–20 tons) for direct shipments from China. However, for stock picked up from overseas warehouses, we support orders starting from 1 ton—ideal for sample testing or small-batch production. Specific MOQs depend on the product category and packaging type; please contact us for details.
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How do you ensure product quality?

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We implement a "three-level quality control" system:
Before leaving the factory: We require the factory to provide a Certificate of Analysis (COA) for the specific batch.
Before shipment: We commission international third-party agencies like SGS or Intertek to conduct random inspections, with costs covered by us (for long-term partners).
After arrival: If quality issues arise, we commit to unconditional negotiation regarding returns, exchanges, or compensation, and we assume full responsibility. All terms are stipulated in the contract.
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We accept T/T (Telegraphic Transfer), L/C (Letter of Credit at sight or usance), and D/P (Documents against Payment). For clients with a long-standing partnership and good credit standing, we offer partial credit terms (e.g., 30–60 days), subject to negotiation based on transaction history and due diligence results. Cash on Delivery (COD) is available for local customers ordering in-stock items from our overseas warehouses.
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What is the typical delivery lead time?

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FOB (China Port): Goods are prepared and shipped within 7–15 working days after the contract is signed and the prepayment is received.
Overseas Warehouse Stock: Items are dispatched within 1–3 working days of order confirmation and payment; local delivery typically takes 2–5 days (depending on the country).
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Which trade terms do you offer? Do you support DDP (Delivered Duty Paid)?

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We are proficient in handling common terms such as FOB, CIF, CFR, and EXW. Additionally, for regions covered by our overseas warehouses, we offer DDP services (including duties and door-to-door delivery), allowing you to receive goods without the hassle of complex import customs clearance procedures. Please consult your sales manager for specific costs.
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How can I obtain samples? What are the costs?

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If stock is available at an overseas warehouse, we can provide 1–2 kg of samples for free; you only need to cover the local courier fees.
If shipping from China, we can arrange delivery via DHL or FedEx; samples are free, but you bear the international shipping costs. Once a clear intent to cooperate is established, these shipping costs can be deducted from your first order.
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Can the contract price be adjusted if product prices fluctuate?

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We offer a price protection mechanism:
For fixed-price contracts, we do not unilaterally raise prices due to market increases.
If you anticipate a market downturn, we can negotiate floating pricing—settling based on a benchmark price on the date of shipment or arrival—to flexibly manage fluctuations.
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What does your after-sales service include?

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We provide full-lifecycle service:
Usage Guidance: Assistance with adjusting processing parameters (if required).
Complaint Handling: Response within 48 hours and a solution provided within 7 days.
Regular follow-ups: Proactive contact every six months to understand changing needs and optimize supply solutions.
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