Sodium Chloride (NaCl)
Broad IR-transmitting crystal with good optical clarity
Infrared Optical Crystal
Sodium Chloride is a cost-effective infrared optical material frequently used in spectroscopy. It provides broad IR transmission but is highly sensitive to moisture and mechanical damage. NaCl is typically selected for laboratory-based FTIR applications where environmental exposure is tightly controlled.
Is this material right for your application?
Use When:
Avoid When:
Consider Alternatives:
Cost-sensitive IR spectroscopy applications are required
FTIR windows or prisms are used in controlled environments
Optical clarity is more important than durability
Components are easily replaceable
Moisture exposure can be avoided
Any moisture exposure is expected
Components require long service life
Mechanical durability or shock resistance is needed
Field or outdoor deployment is required
KBr – improved IR transmission
KCl – better handling characteristics
ZnSe – non-hygroscopic, durable IR optics
Key Properties
Optical
Broad infrared transmission
Mechanical
Very low mechanical strength
Easily cleaved
Environmental
Highly hygroscopic
Poor long-term stability
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Frequently asked questions about Barium Fluoride specifications and use-cases
FAQ
Q1. What wavelength range does NaCl support?
NaCl transmits from ~250 nm to ~16 µm.
Q2. Is NaCl hygroscopic?
Yes. NaCl is highly hygroscopic.
Q3. Where is NaCl commonly used?
IR spectroscopy windows in laboratory environments.
Q4. What are common alternatives to NaCl?
KBr and CsI.
Very moisture sensitive
Soft and easily scratched
Strictly for controlled environments