S.I. No. 151/1949 - Standard Specification (White Spirit) Order, 1949.

S.I. No. 151 of 1949.


I, DANIEL MORRISSEY, Minister for Industry and Commerce, in exercise of the power conferred on me by subsection (3) of section 20 of the Industrial Research and Standards Act, 1946 (No. 25 of 1946), hereby order as follows :

1. This Order may be cited as the Standard Specification (White Spirit) Order, 1949.

2.—(1) The specification set forth in Part II of the Schedule to this Order is hereby declared to be the standard specification for the commodity described in Part I of the said Schedule.

(2) The said standard specification may be cited as Irish Standard 11 : 1949.






In this specification, the letters B.S., when followed by two sets of numbers, refer to the British Standard of which the first is the serial number and the second is the year of its publication by the British Standards Institution.


1. This specification covers the requirements of white spirit for use in thinning paints and varnishes.


2. White spirit covered by this specification shall be wholly a petroleum product. It shall be clear, colourless and free from solid matter and from water. If desired by the purchaser, the odour shall conform to that of an agreed sample.


3. The white spirit on distillation of 100 ml. in the manner described in Appendix A shall yield not more than 10 ml. boiling below 150° C. at 760 mm. pressure, and not less than 80 ml. boiling below 190° C. at 760 mm. pressure.


4. No grease spot or mark shall be visible when about 0·5 ml. of the white spirit is allowed to fall in one place on a sheet of " ashless " white filter paper and the paper is freely exposed to the air for one hour at a temperature of 16° C. to 21° C.


5. The amount of residue remaining after evaporating 50 ml. of the white spirit in a flat-bottomed glass dish, about 7·5 cm. in diameter by 2·5 cm. deep, on a bath of boiling water for a period of 4 hours shall not exceed 0·2 per cent. by weight. The residue shall be wholly organic.


6. When 50 ml. of the white spirit is shaken with 10 ml. of neutral distilled water, the water layer shall remain neutral to methyl orange.


7. The white spirit, when tested in the manner described in Appendix B, shall cause not more than slight discoloration of the copper strip.


8. The volatility of the white spirit, when determined in the manner described in Appendix C, shall be similar to that of the agreed sample, if any, provided by the purchaser.


9. The flash point of the white spirit (Abel closed test) shall not be below 78° F. (25·6° C.).


10. Representative samples, each measuring not less than one imperial pint, shall be taken in triplicate from one or more original and previously unopened containers or from the bulk during filling, and shall be packed in clean, dry, airtight, non-absorbent containers made of material on which the sample has no action. The containers shall be of such size that they are nearly filled by the sample. Each sample container so filled shall be sealed and shall be marked with the date of sampling and with sufficient information to identify the sample.


11. Except where otherwise agreed between purchaser and vendor, the agreed sample referred to in Clauses 2 and 8 shall be one and the same sample and shall comply in all respects with the requirements of this specification. It shall measure not less than one pint and shall be packed in the manner described in Clause 10.


Method of Distillation.

(a) Apparatus :—The apparatus employed shall be the B.S. Distillation Apparatus (B.S. 658 : 1936) using :

Distillation Flask 100 ml. (B.S. 571 : 1924).

Thermometer D 200 C/100 (B.S. 593 : 1940).

Asbestos board support for flask 150 mm. square with central hole 50 mm. diameter (B.S. 658 : 1936).

Condenser Type 1 (B.S. 658 : 1936).

(b) Method of Using Apparatus :—The apparatus shall be assembled as shown in Fig. 1 in B.S. 658 : 1936 Distillation apparatus.

100 ml. of the white spirit to be tested shall be put into the flask and the heat shall be so regulated that the white spirit distils at the rate of 4 to 5 ml. per minute.

(c) Thermometer Correction for Barometric Pressure :—The actual barometric pressure at the time of test shall be recorded and the specified temperatures shall be corrected to 760 mm. pressure by applying a correction of 0·5° C. for each 10 mm. difference in barometric pressure from the standard pressure of 760 mm., the correction being added when the barometric pressure is below 760 mm. and subtracted when above 760 mm.


Method for the Determination of Freedom from Corrosive Properties.

A clean strip of mechanically polished pure sheet copper about 1·8 cm. in width and 7·5 cm. in length shall be placed in a clean test-tube and enough white spirit added to cover the strip completely. The tube shall be closed with a vented stopper and maintained at a temperature of 100° C. for three hours. The copper strip shall be removed, rinsed with sulphur-free acetone and compared with a similar untreated strip of freshly polished copper.


Method for the Determination of Volatility.

Two g. of the white spirit shall be weighed into a flat-bottomed glass dish or other suitable receptacle (about 7·5 cm. in diameter) the bottom of which has been covered with a quantitative filter paper cut to fit within the pan so that the edge of the paper almost touches the sides of the dish. The filter paper shall be maintained in position throughout the test by a small wire legged tripod, the wire legs resting on the edge of the filter paper.

The pan containing the white spirit and paper shall be exposed to the air of a room, free from draughts, at a temperature of from 16° C. to 19° C. The loss in weight shall be determined at intervals and shall follow closely that of the agreed sample, if any, provided by the purchaser, treated similarly and at the same time.

GIVEN under my Official Seal this 23rd day of December, 1949.


Minister for Industry and Commerce.