Characteristics of Natural Soft Rubber (NSR)

	Natural Soft
Weather	△
Heat	△
Low Temperature	◎
Acid	△
Alkali	◎
Abrasion	◎
Vapor Permeability	△
Shock	◎

 

◎ Excellent

O Good

△ Not Good

X Bad

Chemical Resistance of Rubber Lining

Chemical resistance are determined according to test results and actual long-term performance. And accurate material selection requires careful consideration in terms of operating conditions and specifications of equipment.

Therefore, please consult with us in advance for selection of rubber material against your chemical.

Inorganic Acids

Chemical	Formula	Concentration	Natural Soft Rubber R-6
			RT	90°C
Sulfuric Acid	H2SO4	10	O	X
Sulfuric Acid	H2SO4	30	O	X
Sulfuric Acid	H2SO4	50	O	X
Sulfuric Acid	H2SO4	70	X	X
Hydrochloric Acid	HCl	10	O	X
Hydrochloric Acid	HCl	35	O	X
Nitric Acid	HNO3	1	X	X
Sulfurous Acid	H2SO3	0.5	X	X
Phosphoric Acid	H3PO4	–	O	O
Hydrofluoric Acid	HF	1	X	X
Hydrofluoric Acid	HF	48	X	X
Carbonic Acid	H2CO3	–	O	∆
Chlorine Water	Cl2	satu	X	X
Chlorine Gas	Cl2	wet	X	X
Hydrobromic Acid	HBr	40	O	X
Hydrogen Sulfid Water	H2S	–	O	∆
Chromic Acid	H2CrO4	1	X	X

   O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Inorganic Alkalis

Chemical	Formula	Conc. (%)	Natural Soft Rubber R-6
			RT	90°C
Caustic Soda	NaOH	48	O	O
Caustic Potash	KOH	25	O	O
Aqua Ammonia	NH4OH	28	∆	X

O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Inorganic Salts Solutions

Chemical	Formula	Conc (%)	Natural Soft Rubber R-6
			RT	90°C
Sodium Hypochlorite	NaClO	–	X	X
Calcium Hypochlorite	Ca(ClO)2	–	∆	X
Sodium Chlorate	NaClO3	–	O	∆
Potassium Chlorate	KClO3	–	O	∆
Sodium Chloride	NaCl	–	O	∆
Calcium Chloride	CaCl2	–	O	∆
Zinc Chloride	ZnCl2	–	O	∆
Ammonium Chloride	NH4Cl	–	O	∆
Sodium Sulfate	Na2SO4	–	O	∆
Sodium Bicarbonate	NaHCO3	–	O	∆
Potassium Bichromate	K2Cr2O7	–	O	∆
Sodium Sulfite	Na2SO3	–	O	∆
Potassium Sulfite	K2SO3	–	O	∆
Sodium Sulfide	Na2S	–	O	∆
Potassium Sulfide	K2S	–	O	∆
Sodium Thiosulfate	Na2S2O3	–	O	∆
Sodium Phosphate∆	Na3PO4	–	O	∆
Potassium Chloride	KCl	–	O	∆
Ammonium Carbonate	(NH4)2CO3	–	O	∆
Ferric Chloride	FeCl3	–	O	∆
Ammonium Sulfate	(NH4)2SO4	–	O	∆
Stannous Chloride	SnCl2	–	O	∆
Chromium Chloride	CrCl2	–	O	∆
Nickel Sulfate	NiSO4	–	O	∆
Silver Nitrate	AgNO3	–	O	∆
Aluminum Sulfate	Al2(SO4)3	–	O	O
Sodium Silicate	Na2O . SiO2	–	O	O
Sodium Aluminate	NaAlO2	–	O	O
Magnesium Hydroxide	Mg(OH)2	–	O	O
PAC	[Al2(OH)nCl6-n]m	–	O	O

O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Organic Acids

Chemical	Formula	Conc (%)	Natural Soft Rubber R-6
			RT	90°C
Acetic Acid	CH3COOH	10	X	X
Glacial Acetic Acid	CH3COOH	10
Formic Acid	HCOOH	90	O	X
Oxalic Acid	(COOH)2	20	O
Butyric Acid	CH3CH2CH2COOH	100	X	X
Tartaric Acid	(CH OH COOH)2	50	O	X
Lactic Acid	CH3CH(OH)COOH	25

O: Satisfactory       ∆: Marginal       X: Unsatisfactory

Organic Compounds

Chemical	Formula	Conc (%)	Natural Soft Rubber R-6
			RT	90°C
Acetone	CH3COCH3	–	∆	X
Methanol	CH3OH	–	O	X
Ethanol	C2H5OH	–	O	X
n-Propylalcohol	C3H7OH	–	O	X
n-Butanol	C4H9OH	–
Formaldehyde	HCHO	–	O	X
Glycerin	C3H5(OH)3	–	O	∆
Ethylene Glycol	(CH2OH)2	–	O	∆
Triethanolamine	N(CH2CH2OH)3	–	O	∆
Glucose	C6H12O6	–	O	∆

O: Satisfactory       ∆: Marginal       X: Unsatisfactory