Sodium Thiosulfate - Chemical resistance

Sodium thiosulphate is a colourless crystalline compound used in photography as a fixative, in water treatment to reduce chlorine, in medicine as an antidote for cyanide poisoning, in mining to extract gold and silver, and in other industries such as paper, leather, textiles, dyes and pigments.

Molecular formula

Na2S2O3

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Fibre-rubber plates

POWER®gasket 100

Mild - Consult consult

POWER®gasket 200

Mild - Consult consult

POWER®gasket 300

Mild - Consult consult

POWER®gasket 350 A

Not known Not known

POWER®gasket 400

Mild - Consult consult

Teflon plates

POWER®flon 10 BLUE

Excellent suitable

POWER®flon 20 PINK

Excellent suitable

POWER®flon 30 WHITE

Excellent suitable

POWER®flon BG-S

Excellent suitable

Graphite plates

POWER®graf 1 Premium

Excellent suitable

POWER®graf 3 Premium

Excellent suitable

POWER®graf 4 Premium

Excellent suitable

POWER®graf 5 Premium

Excellent suitable

POWER®graf HP

Excellent suitable

Rubber plates

Rubber NR

Good good

Rubber SBR

Good good

EPDM rubber

Excellent suitable

Rubber CR

Excellent suitable

NBR rubber

Good good

Rubber IIR

Excellent suitable

VMQ rubber (silicone)

Excellent suitable

Rubber CSM

Excellent suitable

Rubber FKM

Excellent suitable

All technical data is based on our measurements and experience and is for guidance only. The parameters listed interact if they occur together and must be consulted in limiting cases. The manufacturer is not liable for misinterpretation of the given data and incorrect application of seals

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POWERflon 10 Blue

POWERflon 10 Blue

Sealing plate made of restructured 100% "virgin" PTFE reinforced with hollow glass microspheres against cold creep.

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POWERflon 20 Pink

POWERflon 20 Pink

Sealing plate made of restructured 100% "virgin" PTFE reinforced with silica filler against cold creep. For high pressures and temperatures.

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POWERflon 30 White

POWERflon 30 White

Sealing plate made of restructured 100% "virgin" PTFE reinforced with selected inert fillers against cold creep.

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POWERflon BG-S

POWERflon BG-S

Sealing plate made of multidirectionally oriented expanded 100% "virgin" PTFE. Only the thickness changes under load.

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POWERgraf 1 PREMIUM

POWERgraf 1 PREMIUM

Reinforced with bonded smooth Ni foil 0.013 mm thick (material: 2.4066). For low and medium pressures.

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POWERgraf 3 PREMIUM

POWERgraf 3 PREMIUM

Reinforced with 0.1 mm thick perforated reed plate (material: AISI 316). For medium and higher pressures.

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POWERgraf 4 PREMIUM

POWERgraf 4 PREMIUM

Reinforced with 0,05 mm thick stainless steel foil (material: AISI 316). For low and medium pressures.

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POWERgraf 5 PREMIUM

POWERgraf 5 PREMIUM

Reinforced with expanded stainless steel sheet 0.1 mm thick (material: AISI 316L, 700 g/m²). Ideal seal for large pressure changes.

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POWERgraf HP PREMIUM

POWERgraf HP PREMIUM

Multilayered sealing material made of expanded graphite reinforced with a larger number of inserts without the use of adhesives. Suitable for higher pressures and temperatures.

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EPDM Rubber

EPDM Rubber

Rubber resistant to atmospheric influences, UV and ozone radiation. Excellent temperature resistance.

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CR Rubber (Neoprene)

CR Rubber (Neoprene)

It is used in refrigeration and applications where the seal is exposed to external weathering.

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VMQ (silicone)

VMQ (silicone)

Material resistant to high temperatures and atmospheric influences. Suitable for food applications.

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FKM Rubber

FKM Rubber

FKM has excellent chemical and heat resistance. It is used in mineral oil and grease based applications.

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