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Industrial Fuels and Solvents:-




Light Diesel Oil (LDO)

Light Diesel Oil falls under class C category fuel having flash point above 66OC. It is a blend of distillate components and a small amount of residual components. It is marketed under BIS 1460-2000 specification for Diesel fuels.

Whereas HSD is used as a fuel for high-speed engines having 750 RPM and above in most of the prime movers used, LDO is used in lower RPM engines. It is used in Lift irrigation pumpsets, DG Sets and as a fuel in certain boilers and furnaces.

Safety Information :
  • Reactivity Data - Chemically stable and incompatible with strong oxidizers. Does not React vigorously with common materials but may react with oxidizing agents
  • Health Hazard Data - Routes of entry may be through inhalation/ ingestion/ skin/ eye.
Effects of Exposure / Symptoms :
  • Inhalation causes dizziness and headache.
  • Ingestion may lead to nausea vomiting, irritation of mouth and gastro-intestinal effects likely. Potentially fatal chemical pneumonitis.
  • On Skin and eye contact , irritation will remove natural fats from skin. Prolonged or repeated contact should be avoided, Otherwise skin chapping or cracking or possible contact of dermatitis may result. Dry skin, erythema oil acne and oil folliculitis and warty growth may occur which may become skin cancer subsequently on excessive repeated exposure.
Emergency Treatment :

Inhalation - Remove victim to fresh air. Give artificial respiration if necessary. If unconscious but breathing, place in recovery (Unconscious) position and give external cardiac massage if necessary.

Ingestion - Do not induce vomiting. Remove contaminated clothing. Wash all affected skin thoroughly with soap and water.

Eyes – Irrigate eyes with copious amounts of water. Administration of medical paraffin may reduce absorption through digestive tract.

Gastric lavage should be done only after endo tracheal intubation in view of respiration which may cause serious chemical pnemonitis for which antibiotic and cortico-steroid therapy may be indicated.

Handling and Storage Precaution :
Store in a dry cool, well-ventilated area away from heat and flame and keep away oxidizing agents.

Avoid contact with liquid or vapours. To use gumboots while handling the product.

The fire fighting media to be used is foam, DCP/CO2.

Requirements for Light Diesel Fuels :
Sr.No Characteristics Requirements Test Method
[P:] of IS:1448
1 Acidity (inorganic) Nil [P:2]
2 Acidity, total, mg of KOH/ g, Max


3 Ash, percent by mass, Max 0.02 [P:4]
4 Carbon residue (Ramsbottom) percent residue, by mass, Max 1.5(on whole sample) [P:8]

Pour point , Max
a) Winter
b) Summer

6 Copper strip corrosion for 3 hrs.
at 100OC
Not worse than No.1 [P:15]
7 Flash point
Pensky Martens, OC, Min
66 [P:21]
8 Kinematic viscosity, cst at 40OC 2.5 to 15.7 [P:25]
9 Sediment, percent by mass, Max 0.10 [P:30]
10 Density at 15OC, kg/ m3 To be reported [P:16]
11 Total sulphur, percent by mass, Max 1.8 [P:33]
12 Water content, percent
by volume, Max
0.25 [P:40]

Winter shall be the period from November to February (both months inclusive) and rest of the months of the year shall be called as summer. The values for maximum pour point and CFPP shall be those as directed by OCC from time to time.

Conforms to IS:1460-2000 specification for Diesel Fuels
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