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Safety Data Sheet EN

Silicon

CAS 7440-21-3
EC 231-130-8

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01

Identification

Product identifiers, regulatory numbers, and supplier information

Product Information

Product Name
Silicon
Chemical Name
Silicon

Regulatory Identifiers

CAS Number
7440-21-3 Check regulations →
EC Number
231-130-8 Check regulations →

Identified Uses

Production of Production of refractory electric/electronic/chemical against.

Uses advised against

No uses are specifically advised

Manufacturers & Suppliers

R

R-S Silicon d.o.o.

manufacturer

Bjelajce bb. 70260 Mrkonjić Grad, Bosnia I Hercegovina

+387 50 490 021

02

Hazard Identification

GHS classification, signal word, pictograms, and hazard statements

Classified no signal word

Hazard Classifications

Not Classified

GHS Pictograms

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03

Composition / Information on Ingredients

Chemical components, concentration ranges, and hazardous substance identification

Type substance

Chemical Composition: Si > 95%

Chemical Name CAS Number Concentration Hazardous
silicon EC: 231-130-8 7440-21-3 95% No
aluminium --- 1% No
calcium --- 1% No
iron --- 1% No

Notes

Main impurities aluminium < 1% calcium < 1% iron < 1%

04

First Aid Measures

Emergency procedures for chemical exposure incidents

Inhalation

Move the person to fresh air and keep him or her at rest in a position that promotes breathing. In the event of aches and pains, give oxygen and immediately seek medical attention. In the event of respiratory arrest, perform artificial respiration (only trained personnel).

Skin contact

Wash thoroughly with water and soap. If a skin irritation or rash appear, seek medical attention. In the event of contact with the melted product, cool quickly with water and seek medical attention immediately. Do no attempt to remove the melted product to avoid possible skin lesions.

Eye contact

Rinse thoroughly for a few minutes with water or saline solution, keeping the eyelids open. If the irritation persists, seek medical attention.

Ingestion

Rinse the mouth with water. Do not cause vomiting unless recommended by a doctor. Do not give anything by mouth if the person is not conscious. In the event of aches and pains, immediately seek medical attention.

Immediate Medical Attention

Immediately consult a doctor in the event of aches and pain, or if there are any doubts.

Medical Treatment

Give basic first aid and symptomatic treatment.

05

Firefighting Measures

Extinguishing media, specific hazards, and firefighter protection

Suitable media

Class D extinguishing agents: CO₂, special powder for metal fires or dry sand.

Unsuitable media

Do not use water or halogenated hydrocarbon extinguishers.

Specific hazards

While flammability testing show that the product in pieces/granules is not flammable, small particles can catch fire and propagate a flame, which self-extinguishes quickly. Its intensity increases as the size of the dust decreases. Contact of the melted material with water can cause explosions due to the formation of gaseous hydrogen.

Instructions

Always act according to the firefighting plan for the site. Evacuate and isolate the area until the fire has been extinguished. Limit access to trained personnel only. Make certain there is adequate ventilation. Avoid breathing gases/vapours. Avoid contact with eyes, skin and clothing. Act upwind. Remove containers from the fire area if this can be done without risk. Alternatively, cool any containers exposed to flames with a water spray.

Firefighter Protection

Firefighters must always wear full firefighting equipment: breathing apparatus with air reserve [ref. EN 137], fire-proof clothing [ref. EN 469], fire-proof gloves [ref. EN 659], and firefighter boots [ref. HO A29-A30].

06

Accidental Release Measures

Spill cleanup procedures, containment, and environmental protection

Emergency procedures

Always act according to the emergency plan for the site. Alert the emergency personnel. Avoid generating dust and make certain there is adequate ventilation. Avoid breathing fumes/duct and eye or skin contact. Evacuate and isolate the area, limiting access to trained personnel only. Remove any sources of flames or sparks, and other potential sources of ignition.

Environmental

Avoid dispersion to the environment and flow into drains, water-bodies, and ground water.

Cleanup methods

Collect using mechanical equipment or with an explosion-proof vacuum. Keep dry material separate from wet or humid material. Do not close containers of humid/wet material. Clean the area involved carefully in order to eliminate any residual contamination.

Related Products

Similar products with comparable safety profiles

07

Handling and Storage

Safe handling precautions, storage conditions, and workplace requirements

Handling

The workplace environment and procedures are organised so that direct contact with the product is prevented or minimised. Keep away from sources of flames or sparks, and other potential sources of ignition. Avoid breathing fumes/duct and eye or skin contact. Use suitable personal protective equipment (PPE) (please see SECTION 8.2).

Storage

Store in a dry, well ventilated place. Avoid exposure to high temperatures.

Hygiene

Do not eat, drink or smoke during use. Wash hands and other exposed areas of skin after use. Periodically wash work clothing and personal protective equipment to remove any contamination.

Fire prevention

Keep away from sources of flames or sparks, and other potential sources of ignition.

08

Exposure Controls / PPE

Occupational exposure limits, engineering controls, and protective equipment

Engineering

Provide local ventilation for extraction or other devices to keep the particle level in the air below the recommended exposure limits. Employ extractor hoods or collection devices for eliminating fumes and equivalent dust from the plant.

Hands

Wear protective gloves suitable for the processing to be performed (ref. EN420 - EN388 - EN407). The final decision of the PPE to use must be made based on the operations to be performed (for ex. processing product at high temperatures) and the specific conditions of the workplace. Replace gloves immediately in the event of contamination or breakage.

Eyes

Wear dust-proof eyewear in compliance with the EN166 standard. Wear a face mask during operations such as sawing, grinding or other processing with equipment or in the event of the risk of exposure to splashing product in the melted state.

Respiratory

In the event of insufficient ventilation or the risk of dust inhalation, wear a suitable breathing apparatus with dust filter (FFP2S) compliant with EN149 standard. In the event of suspected exposure hazardous gases in poorly ventilated areas, wear a breathing apparatus with air reserve compliant with EN137 standard.

Skin/Body

Wear suitable protective clothing. The final decision of the PPE to use must be made based on the operations to be performed (for ex. processing product at high temperatures) and the specific conditions of the workplace.

Environmental

Avoid/limit emissions into the environment using filters to abate fumes and dust. Avoid/limit emissions into the environment using filters to abate fumes and dust.

09

Physical and Chemical Properties

Appearance, physical state, melting point, boiling point, and material characteristics

Physical State
Solid
Physical State Data
solid
State Under Standard Conditions
---
Appearance
Solid grey - bluish in a massive form
Colour
---
Colour Intensity
---
Form
---
Odor
Odourless
Odor Threshold
not applicable (odourless solid)
Ph
not applicable (solid insoluble in water)
Melting Point
1414 °C
Boiling Point
not applicable (melting point > 300 °C)
Flash Point
not applicable (inorganic solid)
Freezing Point
---
Softening Point
---
Solidification Point
---
Cloud Point
---
Crystallisation Point
---
Relative Evaporation Rate
---
Evaporation Rate
not applicable (solid)
Vapor Pressure
not applicable (melting point > 300 °C)
Vapor Density
not applicable (solid)
Relative Density
---
Bulk Density
---
Density
2.33 (22 °C) kg/dm³
Flammability
Not flammable
Upper Explosive Limit
not applicable (non-flammable solid)
Lower Explosive Limit
not applicable (non-flammable solid)
Explosive Limits
---
Auto Ignition Temperature
Not self-igniting (solid in massive form)
Decomposition Temperature
Test not available
Solubility
Insoluble in water
Partition Coefficient
not applicable (inorganic solid)
Solubility In Water
---
Solubility In Fat
---
Molecular Weight
---
Voc Content
---
Metal Corrosion
---
Dynamic Viscosity
not applicable (solid)
Kinematic Viscosity
not applicable (solid)
Properties Status
---
10

Stability and Reactivity

Chemical stability, hazardous reactions, and incompatible materials

Stability

The product is stable under normal conditions of use and storage.

Reactivity

High dust concentrations can form a flammable/explosive mixture with air. The reaction with hydrofluoric and nitric acid leads to the formation of toxic gases such as silicon tetrafluoride (SiF4) or nitrogen oxides (NOx). Material can react also to other acids and alkaline products; generating violent exothermic reactions. Small particles can catch fire and propagate a flame, which self-extinguishes quickly. Its intensity increases as the size of the dust decreases; at concentration above 100 g/m³, suspended particles can lead to explosions.

Hazardous reactions

Please see SECTION 10.1.

Incompatible

hydrofluoric and nitric acid, other acids and alkaline products

Decomposition

silicon tetrafluoride (SiF4) or nitrogen oxides (NOx)

12

Ecological Information

Environmental toxicity, biodegradation, and bioaccumulation data

The data for this section has not been processed yet.

13

Disposal Considerations

Waste treatment methods, disposal recommendations, and waste codes

The data for this section has not been processed yet.

14

Transport Information

UN numbers, shipping names, transport classes, and regulatory requirements

ADR

The transported product must have been stored in a covered area, exposed to air, in the size shipped, for no less than three days prior to shipment.

IMDG

The transported product must have been stored in a covered area, exposed to air, in the size shipped, for no less than three days prior to shipment.

IATA

The transported product must have been stored in a covered area, exposed to air, in the size shipped, for no less than three days prior to shipment.

15

Regulatory Information

Chemical regulations, safety assessments, and compliance status

The data for this section has not been processed yet.

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Frequently Asked Questions

Common questions about safety, handling, and properties

What is the hazard signal word for Silicon?

The signal word is no signal word.

What is the physical form of Silicon?

Silicon is a solid appearing as solid grey - bluish in a massive form . It has odourless odor.

What is the solubility of Silicon?

Insoluble in water

What is Silicon used for?

Production of Production of refractory electric/electronic/chemical against.

What is the melting point of Silicon?

The melting point is 1414 °C and the boiling point is not applicable (melting point > 300 °C).